In Hong Kong's labor law and labor contract, it is not stipulated that part-time employees must be paid three times their wages during the Mid-Autumn Festival. Wages and salaries are protected by the Employment Law and the Labor Regulations of Hong Kong, and are decided by both employers and employees through consultation. Although there may be provisions for getting extra salary in some cases, such as legal public holidays or extra working hours, this usually does not apply to all part-time employees. Therefore, whether part-time employees can get extra wages in the Mid-Autumn Festival depends on the specific negotiation and contract terms between employers and part-time employees. Need to remind you that the specific salary should be negotiated with the employer. It is suggested that before accepting a part-time job, you should know the salary and benefits provided by the employer in detail to ensure that both parties reach a written agreement. For a more accurate answer, please consult the relevant employment agencies or labor law experts.