<Chinese TV Series NOW> ”Kyouhyo -End of the Beginning-” 3EP1, An Xin finds a traitor hiding within the police = Synopsis and spoilers R

※This article contains spoilers and synopsis.
"Beginning--" EP1 3 shows An Xin discovering an informant hiding within the police force.
An Xin took the training team to visit Shi Lei's former boss, who had been taken to the hospital. At the suggestion of An Xin and others, Shi Lei and the training team decided to cooperate.
An Xin suspected that someone on his team might be leaking information to Tang Xiaolong.
An Xin and some members of the detective team raided the brothel run by Tang Xiaolong.
An Xin witnessed one of the members of the detective team leaking information to Tang Xiaolong and arrested the member red-handed.
The leadership team was in the interrogation room and the member said that he had solved the violence case for Tang Xiaolong.
Based on his confession, the leadership team was convinced that Tang Xiaolong had committed a crime, and decided to cooperate with police in other areas to crack down on loan sharks, brothels, casinos, etc.
It was a pleasure to see him.