Dark Walker (2022)

Found few similarities in Never Say Goodbye and Day Breaker!

-Both the drama's plots revolve around Drugs
- One of the main leads fakes death [FL in Never Say Goodbye and ML in Day Breaker]
- Undercover main lead(s)
- Dealing with Former Love and Fiancée respectively in Day Breaker and Never Say Goodbye
- Both dramas are available on IQiyi

Luo Xiang, a former narcotics agent, faked his death during an undercover operation. Five years later, he's living under a new name, but needs to pretend to be his old self and once again infiltrate the drug cartel, dealing with his former lover, brothers and enemies, to finally successfully complete the mission and find out who's pulling the strings.

Basically if you like dramas about undercover cops infiltrating cruel gangs with damn good action, try it!

These drama are similar because of
- Fake death
- Hidden identities
- Undercover operation
- Meeting people again with another identity

Two dramas about undercover cops
two dramas have a cop with secret past
two dramas have police and drug cartel undercover missions

Both dramas have undercover cops
Both dramas have undercover informant or agent who has a daughter little girl trying to protect
Both dramas have secret past of the main lead and suspicious alliance

both are undercover cop dramas
both are about drug trafficking
both dramas deal with drug traffickers
both are suspenseful

Both dramas have corrupt cops or seem to be corrupt and a lot of detective work involves drug gangs and very complicated relationships between the cops