According to the company type, the provisions are as follows:
Paragraph 3 of Article 52 of the Company Law
The chairman of the board of supervisors of a limited liability company shall be elected by more than half of all supervisors.
Paragraph 2 of Article 7 1 of the Company Law
The chairman of the board of supervisors of a wholly state-owned company shall be appointed by the state-owned assets supervision and administration institution from the members of the board of supervisors.
Paragraph 3 of Article 1 18 of the Company Law
The chairman and vice-chairman of the board of supervisors of a joint stock limited company shall be elected by more than half of all supervisors.