China State Railway Group Co., Ltd., China Investment Corporation, and CITIC Group.

1. China State Railway Group Co., Ltd.: It is a national railway management organization, responsible for railway passenger transportation, freight transportation and construction, and ensuring the stable operation of the national railway network.

2. China Investment Co., Ltd.: As a wholly state-owned company, it focuses on the investment management of foreign exchange funds. Its registered capital is as high as 200 billion US dollars, which is derived from the special treasury bonds raised by the Ministry of Finance.

3. CITIC Group: As a large comprehensive multinational enterprise, it spans the financial, industrial and service industries, with extensive business and far-reaching influence.

These ministerial-level central enterprises occupy an important position in the national economy and play a positive role in promoting economic development and social stability.