Jurassic miner

1.

There are 13 mining bureaus in China

Fengcheng Mining Bureau
, Xingtai Mining Bureau
, Tongchuan Mining Bureau, Hancheng Mining Bureau, Xuzhou Mining Bureau, Huainan Mining Bureau
, Huaibei Mining Bureau, Zibo Mining Bureau
, Xinwen Mining Bureau, Lu'an Mining Bureau
, Datong Mining Bureau, Chenghe mining bureau
, Fenxi Mining Bureau

Datong Mining Bureau is the largest coal enterprise in China. The coal field covers an area of 1827 square kilometers, with a total reserves of 37.5 billion tons. The Jurassic coal measure reserves are now 6.7 billion tons

extended data

Mining Bureau is a coal proction enterprise, which belongs to the coal instry administration of all provinces, cities and autonomous regions. In recent years, many local mining bureaus have been reorganized. For example, Datong Mining Bureau has become Datong Coal Mine Group Co., Ltd. and Shenhua Group has acquired many local mining bureaus. The original mining bureau is now integrated into a mining group

ranking of China Mining Group:

1, Shenhua Group Co., Ltd.

2, China Coal Energy Group Co., Ltd.

3, Shanxi coal transportation and Marketing Group Co., Ltd.

4, Henan Yongcheng Coal and Power Holding Group Co., Ltd.

5, Shanxi Coking Coal Group Co., Ltd.

6, Yankuang Group Co., Ltd.

7 Pingdingshan Coal Instry (Group) Co., Ltd.

8, Shanxi Datong Coal Mine Group Co., Ltd.

9, Shanxi Jincheng Anthracite Mining Group Co., Ltd.

10, Shanxi Lu'an Mining (Group) Co., Ltd

2. Also, when you have finished, you need to download the certificate to the local and then fill it up to Alipay. What's the reason?