Legal basis: Article 117 of the Company Law of People's Republic of China (PRC) establishes a board of supervisors with no less than three members. 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 and may have a vice-chairman. The chairman and vice-chairman of the board of supervisors 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, the vice chairman of the board of supervisors shall convene and preside over the meeting of the board of supervisors; If the vice 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. The provisions of Article 52 of this Law on the term of office of supervisors of limited liability companies shall apply to supervisors of joint stock limited companies.