It depends on whether the company's rules and regulations stipulate that employees can't drink alcohol during working hours. If not, they can ask for financial compensation. If so, they can be fired without compensation.

legal ground

Article 39 of the Labor Contract Law of People's Republic of China (PRC) is under any of the following circumstances, the employer may terminate the labor contract:

(a) during the probation period, it is proved that it does not meet the employment conditions;

(two) a serious violation of the rules and regulations of the employer;

(three) serious dereliction of duty, corruption, causing great damage to the employer;

(4) The laborer establishes labor relations with other employers at the same time, which has a serious impact on the completion of the work tasks of the unit, or the employer refuses to correct it;

(5) The labor contract is invalid due to the circumstances specified in Item 1 of Paragraph 1 of Article 26 of this Law;

(6) Being investigated for criminal responsibility according to law.