Hong Kong Film: Is My Rebirth System or Undercover?

I was originally an ordinary person who worked nine to five and played games every day after get off work. One night, I couldn't sleep in the middle of the night, so I took half a bottle of melatonin. I fell into a drowsy sleep and suddenly woke up to find that I was reborn and traveled to a world I often saw in movies in my previous life. This is Hong Kong, the Hong Kong after 1968. From then on, I had a new name: Chen Haonan. And there was a special system that accompanied me to Hong Kong. I had no idea what was going on, why I came here, and what I was going to do. I could only follow the system step by step. I originally thought that I would be a gangster brother like Chen Haonan, but I didn't expect that he would let me be an undercover agent. . . . . This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.