I think that is no descript in my contract about duties, I only found the following text describing the duties:
a), the employee agree that the employee shall at all times faithfully, diligently, and to the best of the employee's skill, ability, experience and talents,perform the employee's duties. as long as the employee is employed by the employer, the employee shall perform the employee's duties in a manner which is in the best interest of the emplouer and in accordance with the objectives and procedures set by the employer.
b): during the term of this agreement, the employee agrees that the emplouee shall devote the employee's full-time attention to the employer, and the employee shall not participate in any other busuness,occupation,or become a director,officer,employee or agent of any corporation,firm or individual,except with the consent of the employer.