legal ground
Paragraph 1 of Article 44 of People's Republic of China (PRC) Company Law
A limited liability company shall have a board of directors with three to thirteen members; However, unless otherwise provided for in Article 50 of this Law.
Article 50
A limited liability company with fewer shareholders or a smaller scale may have an executive director instead of a board of directors. The executive director may concurrently serve as the company manager.
The functions and powers of the executive director shall be stipulated in the articles of association.