Foshan Chancheng takes the lead in using blockchain Technology

1.

From the perspective of technology and architecture, I will tell you my understanding of blockchain in common language

what is blockchain? In a word, blockchain is a storage system. To be more specific, blockchain is a distributed storage system without an administrator and each node has all the data

What are the common storage systems like

as shown in the figure above, the bottom is data, and the top can write data. A space to store data, a software to manage data, provide an interface to write data, this is the storage system. For example, MySQL is the most common storage system

What are the problems of ordinary storage system? There are at least two common problems

the first is the problem of non high availability. There is a dangerous place for data. In technical terms, data is not highly available

The second problem is that there is only one write point. In technical terms, it is a single point of control

How do ordinary storage systems usually solve these two problems

in fact, MySQL can do a master-slave synchronization of al master, master-slave synchronization of al master, two nodes can be written at the same time. If you want to do a multi room multi live data center, in fact, multi room multi live data synchronization. What we should emphasize here is that multi-point writing often leads to the consistency problem of writing conflicts. Take MySQL as an example, suppose that the attribute of a table is self incrementing ID, then the data in the database is 1234 now. If one of the nodes writes and inserts a piece of data, it may become 5, and then these 5 pieces of data are synchronized to another master node, Before synchronization, if another write node inserts a piece of data, a piece of data with self incrementing ID of 5 will be generated. Then, after the generation, synchronize to another node, and the synchronized data will conflict with the two local 5's after it arrives, which will lead to synchronization failure and write consistency conflict. This problem will occur in the case of multi-point writing

how to ensure consistency in multi-point writing

the reform "Swan class" gives you more technical work

2. Bitcoin is characterized by decentralization. As long as you have a network and can use your wallet, you can use it regardless of national boundaries. If you don't understand, maybe you can go to Babbitt to find a master.

3. More efficient and accurate use of new technologies

4. 50% of the funds are used for the team to pull people and squander, and the money can be returned quickly. Brainwashing is very easy. With the consistent international pyramid marketing model, cash flow is very slow, and it's easy to make money. You can't catch the third line leader until you call the police 110 before you run. It is estimated that the big head can't be grasped, and the whereabouts of funds are particularly complex..

5.

Snowball (Foshan) blockchain Investment Co., Ltd. is a limited liability company incorporated on June 28, 2018 (wholly owned by a legal person who is not invested or controlled by a natural person). Its registered address is located at room 11, room 212, building 2, Honghui City Instrial New Town, No. 65 Guiping middle Road, Guicheng Street, Nanhai District, Foshan City

the unified social credit code / registration number of xueqiu (Foshan) blockchain Investment Co., Ltd. is 91440605ma51xggtxe, and the legal person is Liang Junhao. At present, the company is in business

the business scope of xueqiu (Foshan) blockchain Investment Co., Ltd. is: investment and asset management (using blockchain technology to engage in instrial investment); Capital investment services (investment in blockchain technology and related instries, culture and art instry, ecation instry, entertainment instry, instry, information instry, new energy instry, high-tech instry, intelligent equipment instry, scientific research and technical service instry, permitted and encouraged projects in Nanhai District of Foshan city instry orientation catalogue, government and social capital Cooperation (PPP) projects, Venture capital service, enterprise investment service); Angel investment; Holding company services; Enterprise headquarters management; Other organization management services; Other business services; Human resource services; Resources and property rights trading services; Integrated management services; Conference, exhibition and related services; Consultation and investigation; Public facilities management instry; Culture and art instry; Cultural and sports entertainment activities and agency services; Film and television program proction; Distribution of films, radio and television programmes; Recording proction; Culture and art training; Vocational skills training; Sports schools and sports training (sports training); Ecational support services; Research and experimental development; Professional technical service instry; Science and technology promotion and application service instry; Internet and related services; Information system integration and Internet of things technology services; Information processing and storage support services; Digital content service; Software development; Information technology consulting service; Other information technology service instries not listed (entrusted by financial institutions to engage in financial information technology outsourcing, entrusted by financial institutions to engage in financial business process outsourcing, entrusted by financial institutions to engage in financial knowledge process outsourcing) (the above business items do not include those prohibited and required by laws, administrative regulations or decisions of the State Council to be approved before registration) Projects that need to be approved according to law can only be operated with the approval of relevant departments.) Projects that need to be approved according to law can be operated only after being approved by relevant departments)

snowball (Foshan) blockchain Investment Co., Ltd. has invested in one company with 0 branches

check more information of xueqiu (Foshan) blockchain Investment Co., Ltd. through aiqicha

6. You can start with four fish, because this risk is relatively small. The fish farm with 20 acres of fish is 20T year old. I suggest
first, you should know the climate of the pond, confirm what kind of fish you are looking for, and then look into your local market, see what the price of the fish is, see what kind of fish the local people love to eat, and decide the main fish culture. Then I'll see what to do with the ten Mu open space. Is it to grow grass and feed grass carp, or to develop other sidelines, or to fish? I'm going to graate next year and also plan to engage in fishing. I have a lot of information about fishing on hand. I can send it to you for you to study together
1. What do you need to prepare for fish pond culture< All you need to do is: pump for feeding, depending on the area and quantity.
boat for spraying medicine and fishing, not too good.
net for rain, depending on the size of your fish.
scale for weighing fish and selling fish.
sun umbrella for anglers.
fishing equipment including pole, float, drop and line, not too good
fish medicine and feed, fry
if possible, a set of water quality inspection equipment should be provided< Secondly, the newly excavated fish ponds should be disinfected before fish culture, that is, the pond should be cleaned
quicklime is the best medicine for pond cleaning, and the use method and quantity are the same as those in seedling pond. The pond should be cleaned and disinfected 15-20 days before the fry are put into the pond, preferably in sunny days. The pond water should be drained first to remove silt and weeds. The pond can be disinfected with quicklime, tea seed cake, bleaching powder, etc
quicklime disinfection: 75 kg of quicklime is used for each mu of pond, and there is 8-10 cm shallow water at the bottom of the pond. The lime is dissolved with water in a threshing bucket, stirred and evenly sprinkled on the next day. If there are any wild fish that have been killed, they must be fished out, and the surface sludge at the bottom of the pond must be removed, so as to improve the disinfection efficiency. For some ponds that are difficult to drain, or for fish ponds that have no water source for irrigation, the water depth is 1 meter, and 90-100 kg tea cakes are used per mu. The same method is used to add water, stir it evenly, and then sprinkle it immediately. After 7-10 days of pond cleaning, live fish are put into a small cage to test the water in the pond. After the pond is toxic, fish fry can be raised.
tea cake "pond cleaning": Because tea seed cake contains saponins, it has toxic effect on wild fish, aquatic insect tadpoles and snails, but has no effect on pathogenic bacteria. The usage method is as follows:
first crush the tea seed cake, then soak it in warm water for 24 hours, then add water evenly, sprinkle it on the whole pool, disinfect it in shallow water, use 25-30 kg per mu, if the water depth is 1 meter, use 90-100 kg per mu, clear the pond for 10 days, then put the fry
bleaching powder pond cleaning: bleaching powder contains about 30% available chlorine, which is decomposed into hypochlorous acid and calcium chloride after adding water, and then primary oxygen is released ring the decomposition of chloric acid, which has strong anti-virus effect. For a pond with a depth of 1 meter, use 12.5-15 kg of bleaching powder per mu, add water to dissolve it, stir it evenly and sprinkle it all over the pond. Fry can be released 5 days after pond cleaning
it can also be diluted with 2 grams of rotenone per cubic meter of water, then sprinkled in the whole pool, and the fry can be released after 7-8 days. Then add new water and fish fry feed appropriately, and 75 kg of fermented pig and cow ng can be added per mu< Third, how to choose fish species
fish culture is generally polyculture, and the fish in the upper and lower water layers are all raised to make full use of the space
one or two kinds of fish can be raised together with filter feeding fish, such as silver carp and bighead carp, to maintain water quality
first of all, you need to know what kind of fish you raise. The common herbivorous fish are grass carp, Changchun bream, blunt snout bream, etc. if it is grass carp, you can raise it with grass. The grass carp's teeth can eat the leaves of reed, but sometimes it can't catch the hard straw. It is suggested that the remaining grass should be fished out immediately to prevent its corruption from affecting the water quality, It is necessary to combine green feed with concentrate feed for grass carp culture< How to get high yield in intensive fish pond is a complex ecological environment, and its fish yield is restricted by many factors. The changes of water ecological factors are related to the quality of water quality, and ultimately affect the level of fish proction. The higher the yield is, the more prominent the water quality problem is, which often becomes the main limiting factor to improve the yield per unit area. The key to achieve high yield of fish culture is to master the characteristics of water quality changes in high yield fish ponds and take effective improvement measures< (1) transparency
transparency is the degree of light penetration into the pond water, which mainly changes with the turbidity of the pond water. Turbidity is caused by the mixing of various particles and plankton in the pond water. A transparent plate is usually used to determine the transparency of water. It is made of a round piece of iron with a diameter of 20 cm. A small hole is opened at the center of the circle, a string with a scale mark is put on, and the round piece of iron is divided into four equal parts through the center. Paint the two equal parts of the corner white and the other two equal parts black to make the round iron piece black and white. When measuring, hold a small rope and slowly sink the transparent plate into the water. When you see that the black and white parts of the transparent plate are indistinct, you stop sinking. At this time, the length of the rope immersed in the water is the transparency of the pond water. The simple measurement method is: the palm is perpendicular to the arm, the palm is placed horizontally in the water, and the palm is sunk down to the depth when you just can't see the palm clearly, which is the transparency
transparency can roughly indicate the abundance of plankton and the degree of water quality. Generally, the transparency of 25-40 cm is called fat water. The pond water is thick, not too turbid, and has no fishy smell. It is oil green or yellowish brown, giving people a feeling of tenderness. In this kind of water, fish float in the morning and disappear after sunrise. Transparency is often more than 60 cm, known as thin water, pond water is light, light green or light yellow, fish do not float in the morning. When the transparency is less than 20 cm, it is called old water. The pond water is too thick and turbid. It often has a fishy smell. It is gray blue, dark green or brown with black. It gives people a feeling of old and thick. In the early morning, the fish float seriously, but it does not disappear after a long sunrise. The transparency of high-yield fish pond should be 18-30 cm in April to October and 18-25 cm in May to September
(2) dissolved oxygen
oxygen is one of the necessary conditions for fish to survive. The respiration of fish, shrimp, shellfish and algae all consume oxygen, and the decomposition of organic matter and sediment in the water also consumes a lot of oxygen, so the dissolved oxygen in fish pond water is low and changeable. The high-yield fish pond has a high feeding density, and the fish are often faced with hypoxia, resulting in a large number of floating head or suffocation death. Therefore, there are special requirements for dissolved oxygen variation in high-yield intensive fish ponds. Generally, the surface water of high-yield fish ponds varies from 5.5 mg / L to 18 mg / L in the afternoon, while the bottom water varies from 4 mg / L to 8 mg / L. at 6 am, the dissolved oxygen in the pond water is the lowest, which is close to the critical value of fish floating head (2 mg / L). The variation range of dissolved oxygen will not affect the normal growth of fish, but the measures of increasing oxygen should be taken to increase the yield of fish
(3) oxygen consumption
the oxygen consumption of high-yield fish ponds varies greatly, ranging from 10 mg / L to 25 mg / L, with an average of 12 mg / L to 15 mg / L. Therefore, 12-15 mg / L has become the mark of fertilizer and water
(4) pH
the suitable pH range of fish culture water is 7-8.5. The water quality of high-yield fish ponds is generally weak alkaline, and the pH value is stable at about 8. The water quality has a good buffer, which is concive to the growth of fish
(5) nitrogen and phosphorus
the total amount of three kinds of inorganic nitrogen in high-yield fish ponds is 1-3 mg / L, and the average value is 1.5 mg / L. The soluble phosphate content was 0.1-1 mg / L, with an average of 0.2-0.4 mg / L. The ratio of nitrogen to phosphorus was 7 ∶ 2“ In the "three nitrogen", ammonium nitrogen accounts for 60% ～ 75%, nitrate nitrogen 20% ～ 24%, nitrite nitrogen 1% ～ 2%, and the ratio of nitrogen and phosphorus is reasonable
(6) phytoplankton
there are more than 10 dominant phytoplankton populations in fish ponds, such as Cryptophyta, cryptocyanophyta, Chlorella, cruciform algae, Chlamydomonas, Chlorella, Scenedesmus, microcyclic algae, linear algae, planisphyta, and Euglenophyta. The dominant population of zooplankton is rotifer, and the main species are rotifer crystallocystis, rotifer schizopodis, rotifer verrucosa, rotifer Brachionus calyciflorus, rotifer spinosa, etc. Cladocera and Copepoda are rare, and their biomass is less than 1 mg / L. The number of phytoplankton varied from 10 million to 20 million / L, and the biomass varied from 30 mg / L to 110 mg / L, with an average of 60 mg / L to 80 mg / L. Zooplankton accounts for about 1 / 4-1 / 3 of phytoplankton. There is a positive correlation between plankton and fish proction. One of the keys to high-yield fish culture is "fish culture by looking at the water", so fishermen usually identify the water quality according to the water color, and the water color of fish pond is mainly determined by the species and quantity of plankton< (1) adjust the water quality flexibly according to the water color and transparency
if the transparency of the pond water is too low (less than 20 cm), it means that the water quality is too rich and the plankton reproction is too abundant. When the weather is abnormal, it is easy to die and rot in large numbers, which makes the water quality suddenly change, and then turn clear and stink. Fishermen call it "Stinky water". At this time, the dissolved oxygen in the water is consumed, and the pond water is seriously anoxic, which is easy to cause a large number of fish death. Therefore, when it is found that the water quality is about to change suddenly, it is necessary to flush fresh water or start the aerator in time to increase the dissolved oxygen in the water to prevent the deterioration of water quality. When the transparency is above 40 cm, it indicates that the water quality is too thin and the plankton quantity is too small, so fertilization should be carried out in time. The quick acting method is topdressing with ammonium bicarbonate and superphosphate, 10 kg per 667 square meters of water surface. If the transparency does not return to below 35 cm within 5 days after fertilization, it should be fertilized again. After that, the transparency of pond water can be kept 20-40 cm by fertilizing every 15-20 days and applying organic fertilizer such as human and animal manure properly
(2) timely water injection and raising the water level of the fish pond
ring the peak season of fish growth from April to June, water injection is concted once to three times a month to increase the water depth of the fish pond by 10 cm each time, which can not only supplement the lack of dissolved oxygen in the water, but also improve the water quality
(3) timely start the aerator
in principle, one aerator with a power of 2.5 kW is equipped for every 0.67 hectare of water surface in fish ponds with fish proction of more than 500 kg per 667 square meters. It starts for 1-3 hours a day from April to June and 4-8 hours a day from July to November< (4) turn the sediment to improve the water quality
from May to September, turn the fish pond sediment 1-2 times a month with a mud rake to release the nutrients in the sediment, so as to achieve the purpose of fertilization, recing the oxygen consumption of sediment and improving the water quality
(5) applying chemical fertilizer to improve water quality
from May to September, the ratio of nitrogen and phosphorus was 1 ∶ 1. The application of 4-5 kg per 667 square meters of water surface, once every 3-4 days, can not only increase the biomass of pond water, but also achieve the goal of biological oxygenation< (6) lime is used to improve water quality
from May to August, the whole pond is sprinkled with quicklime solution once or twice a month, so that the drug content of each cubic meter of water body is 25-30g, which is helpful to improve water quality
(7) cleaning
clean the pond water regularly to keep the water clean
through the above measures, the high-yield fish pond can maintain the best water quality of "fertilizer, liveliness and freshness"“ "Fertilizer" refers to the abundant dissolved nutrient salts in the water and the large number of plankton species“ "Live" refers to the rapid circulation of nutrients in water, the water color is lighter in the morning and thicker in the afternoon“ "Shuang" means that the pond water is rich but not turbid. Fish grow fast and have few diseases in such good water quality

7.

Foshan tepin blockchain Technology Co., Ltd. is a limited liability company (invested or controlled by natural person) registered on August 1, 2018, with its registered address at room 4, room 902, block 8, No. 123, Lingnan Avenue North, Chancheng District, Foshan City (address declaration)

the unified social credit code / registration number of Foshan tepin blockchain Technology Co., Ltd. is 91440604ma5236852a, and the legal person is Liu Ying. At present, the enterprise is in the status of cancellation

the business scope of Foshan tepin blockchain Technology Co., Ltd. is: blockchain information technology research and development and technical services; supply chain management; Computer technology development, technology consultation, technology transfer, technology service (except Internet service and Internet Information Service), computer system service, enterprise management consultation, enterprise marketing planning and marketing planning; Design, proce, act as an agent and publish all kinds of advertisements; Film and Television planning; Data service and data processing; Health consulting services (except for the approved diagnosis and treatment activities)

view more information of Foshan tepin blockchain Technology Co., Ltd. through aiqicha