Is Sam, the gatekeeper, an undercover agent?

Sam is not an undercover agent:

The Gatekeepers is a TV series produced by Guan Shuming and starring Yuan Weihao, Zhiwen, Wang Minyi, Chen Jiale and Liu Peiyue. It will be released on September 13, 2021 Broadcast on the Miandui APP.

The play takes the Hong Kong Customs as its theme and tells the story of the efforts and persistence of the Hong Kong Customs in safeguarding Hong Kong people.

The Hong Kong Customs is a powerful force that deserves the respect of Hong Kong people. Behind strong people, they also need the silent dedication and support of their families, so that they can be more powerful to take on the job of checking. They guard Hong Kong, and they also guard a home in private. The story will tell the details of their lives such as getting along with their families and the pressure they encounter in life, expressing their human side.

Haifeng, senior supervisor of the Copyright and Trademark Investigation Division, and his subordinates planned to smash a mobile phone factory that used pirated parts. Wen Zhiqi, supervisor of the Customs Narcotics Investigation Division, was also investigating a drug trafficking case. On the day of the operation, Zhiqi He relied on his keen observation to uncover the tricks of drug dealers. Unexpectedly, the other party resisted when he was arrested. Fortunately, Haifeng suddenly appeared to rescue him. Although Haifeng's deployment was disrupted, he had a contingency plan in advance and successfully solved the case. ?

At the end of the operation, Zhiqi’s subordinates had a few words for her. Zhiqi had always regarded Haifeng as an imaginary enemy and was unwilling to be assisted by him. Haifeng met with his subordinates to celebrate, and he did not forget to care about his girlfriend and serve in his post. Ms. Kwan Pui-yan, Chief Trade Control Officer of the Commodity Description Section of the Trade Control Department.