The Crazy Companies II

The Crazy Companies II is a 1988 Hong Kong comedy film directed by Wong Jing starring Andy Lau, Sandra Ng and Natalis Chan.

At the reception we learn that the Kwais brother is in financial trouble and the company is going to be bought over by Foks thanks to the meddling of evil executive Robert Cheng. After the takeover, Kwai, Horny, Frank and Kim must get jobs with Foks and rise up the corporate ladder again before Robert Cheng returns from his 3month vacation.

Source: Wikipedia