Infernal Affairs of Dragon Gate

The four books are complete, so you can read with peace of mind. "We agreed on three months, then another three months, then another three months, and now it's been a year, boss! I'm about to become the head of Reunion! When can I go back to Lungmen, Chen sir?" Xiu Xian, an unlucky transmigrator who inexplicably ended up in the Lungmen Guard Bureau and then inexplicably was sent to Reunion as an undercover agent. "Be nicer to me. Only I know your identity in the entire Lungmen. I'll go back and delete your information; you can stay in Reunion for life!" "Please, I'm almost the boss! You still want me to..."