Stealth Walker (2021)

In both dramas, the main character goes undercover in the drug world after someone they loved is killed.

The main character is really good at improvising and at getting themselves out of tricky situations.

Both dramas feature a subplot with a scientist making drugs for the drug lord.

In both dramas, the female lead is rash and fearless. She has a goal and she's willing to push herself to the limit to achieve that goal.

Both dramas feature actor Li Zi Feng in a role somewhat similar: he's more kind and pensive while the female lead is the wildcard.

In both dramas, the female lead pretends to be someone she's not and manipulates people.

Some similarities:
- chinese crime drama focusing on police, undercover work and drug trafficking
- past tragic events of main leads have something to do with drugs and crime
- action, investigations and sometimes slice of life moments
- you get to know the main antagonists and get insight into their criminal activities

Some differences:
- The First Shot focuses on the Special Investigation Team, especially the two MLs. There are several small undercover jobs, but also a lot of other police work
- Stealth Walker focuses on the FL and she is undercover for almost the entire drama
- The First Shot mainly shows friendships between the Special Investigation Team
- Stealth Walker has a slight romance plot between FL and ML