Mr. Pang met with Cheng Bing and learned of Cheng Bing's identity. He admired him very much for persisting in looking for Wang Dayong despite not being a policeman.Cheng Bing learned from Mr. Pang that Wang Dayong robbed Mr. Pang and shot him, causing Mr. Pang to become lame.Mr. Pang had been looking for Wang Dayong, and later learned through surveillance that Wang Dayong had prepared for the robbery for half a year in advance, and after the robbery, he crossed the border and returned to China.

Mr. Pang was determined to find Wang Dayong and was willing to pay a lot of money to let Cheng Bing help him find it. Cheng Bing did not want the money and just hoped that Mr. Pang would not embarrass the boy. Mr. Pang agreed and returned all their things at the same time.Cheng Bing contacted Lao Liao immediately, and everyone in the country felt relieved.

Old Tang saw Cheng Bing who came to see them, saw the photo of the original stone that Cheng Bing brought, and promised to help him find out whether the original stone appeared again.

Cheng Bing and Shitou returned to the country to meet Lao Liao and others, and told everyone what they had encountered during their trip.

Cheng Bing met Pan Dahai to provide clues about the original stone. Pan Dahai once again persuaded Cheng Bing to give up tracking. He heard Cheng Bing mention the running case and told him about the fingerprint database that relied on technology.

At the meeting, Pan Dahai asked everyone to trace the situation of the original stone. Lin Ying recognized Cheng Bing's idea and reminded Lin Ying that Cheng Bing was not a policeman.

Lao Liao's wife was very dissatisfied because Team Three never paid for their dinner party in the store, and she also didn't like that Team Three kept thinking about Team Three.

Everyone gathered at Cheng Bing's office to hunt down Wang Dayong. After discussion, they decided to investigate through clues from the original stone.

After Cheng Bing added Tongtong's contact information, and through her deciphering of Martian texts, he suspected that Tongtong was in early love. He later stopped the boy from pestering Tongtong after school, but Tongtong asked him not to disturb her life.