Hong Kong movies: Kill the boss at the beginning and take the position for yourself!

The Dragon Ancestor has traveled through time!
I traveled back to the 1980s, a time of great upheaval and the rise of many powerful figures in Hong Kong.
Some call him a devil, others call him an executioner!
Years later, a reporter interviewed Long Zu.
"Mr. Xu, some people say you are the underground emperor of the Third World. What do you think of this?"
“Slander, pure slander. As everyone knows, I am just an ordinary, kind, and patriotic businessman.”
"Then why do some people say you're the retired emperor from South Korea?"
"This is the greatest insult to my personality. What era are we living in? Why are you still talking about an emperor emeritus?"
The Dragon Ancestor spoke slowly, while the newest girl group members standing behind him trembled slightly.
"I've heard that the laundry detergent shortage in Japan is because of you. Do you have anything to say about that?"
"Huh? I'm a legitimate businessman. What does this have to do with me? As for the rampant drug problem over there, how would I know anything about it?"
I'm terrible at giving introductions, please read the main text, thanks guys!