Hong Kong film: I, Liang Xiaotang, the sister-in-law with a good start

Traveling through the world of Hong Kong movies, he became the most arrogant and tempting undercover agent in history, Liang Xiaotang! (Nickname: Brother Laughing)
Accidentally activate the option system and discover this world is not easy.
When he was in the police academy, he had a female classmate named Liang Xiaorou, and later Zhou Wangqing from the Criminal Intelligence Section of CIB became his contact person.
There is a foot massage shop downstairs called Haojiaotou, and the propriet...