Yes, the chairman of a limited liability company can also serve as the general manager.
legal ground
Company Law of the People's Republic of China
Article 13 The legal representative of a company shall be the chairman, executive director or manager in accordance with the articles of association, and shall be registered according to law. Where the legal representative of the company changes, it shall go through the registration of change.
Article 51 A limited liability company shall set up a board of supervisors with not less than three members. A limited liability company with fewer shareholders or smaller scale may have one or two supervisors instead of a board of supervisors. The board of supervisors shall include an appropriate proportion of shareholders' representatives and employees' representatives, of which the proportion of employees' representatives shall not be less than one third, and the specific proportion shall be stipulated in the articles of association. The employee representatives in the board of supervisors are elected by the employees of the company through employee congresses, employee congresses or other forms of democratic elections. The board of supervisors shall have a chairman, who shall be elected by more than half of all supervisors. The chairman of the board of supervisors shall convene and preside over the meeting of the board of supervisors; If the chairman of the board of supervisors is unable to perform his duties or fails to perform his duties, more than half of the supervisors shall jointly nominate a supervisor to convene and preside over the meeting of the board of supervisors. Directors and senior managers shall not concurrently serve as supervisors.