Episode 29 recap: Hou San Jin was caught trafficking drugs, and Tan Bai confessed to being involved in the fitness industry.

Yao Yu Ling refused to divulge any information, so Niu Da Li could only take out the gold ring he had prepared and intended to give to Yao Yu Ling. Yao Yu Ling understood Niu Da Li's intention, but she couldn't easily accept his gift and had to come up with excuses to make Niu Da Li take the ring back. Niu Da Li had no choice but to agree to keep the ring for Yao Yu Ling and took it back.

Wang Xin and Ma Kui found San Tou Qiang (Three-Blade Qiang) by using a phone booth and followed him to the Fu Qiang Hotel. San Tou Qiang went upstairs, and Wang Xin followed, but the hotel owner sat at the second-floor entrance, making it impossible for Wang Xin to see which room San Tou Qiang was staying in. He could only pretend to inquire about room availability. Wang Xin went downstairs to explain the situation to Ma Kui, who kept an eye on the hotel. Ma Kui noticed that after San Tou Qiang went upstairs, a room on the second floor lit up, confirming San Tou Qiang's location. With the target's whereabouts confirmed, the next step was to find San Tou Qiang's contact person and the source of the goods. Therefore, Wang Xin continued to observe from across the street.

While Wang Xin was observing, Ma Kui went to find the local police officer, A Jie. Unexpectedly, A Jie had finished work and started a stall, which gave Ma Kui a new perspective on doing business. Ma Kui asked A Jie to help investigate the details of the hotel and wait for further actions from San Tou Qiang. The next day, A Jie went to the hotel to meet Wang Xin and the others and provided information about San Tou Qiang and the hotel owner.

The hotel owner at Fu Qiang Hotel was cooperative, and the police now knew San Tou Qiang's real name. They decided to wait patiently for San Tou Qiang's next move. Niu Da Li returned to the courtyard and gave some money to the children as pocket money. He also promised to install running water in the courtyard, but the people in the courtyard were reluctant. They believed that installing running water required a lot of money and it was not easy for Niu Da Li to earn money. They all hoped that Niu Da Li would save money and get married sooner. Niu Da Li was moved by everyone's concern for him and couldn't help but cry.

Ma Yan saw Niu Da Li crying and asked him about it. Niu Da Li explained that he didn't want to leave everyone, but he had to return to Shenzhen in the afternoon. When everyone learned that Niu Da Li was going back to Shenzhen, they went to say goodbye and hugged him. They also teased him about his outfit, hoping that he could return to Shenzhen safely and come back to visit whenever he missed home.

San Tou Qiang stayed in the hotel for several days, occasionally going to the phone booth to make purchases and calls, without any unexpected incidents. He didn't contact anyone, and no one approached him. Ma Kui and Wang Xin became anxious and couldn't understand why San Tou Qiang hadn't made the delivery yet. Just as they were wondering, A Jie received a phone call informing him that San Tou Qiang had already contacted Hao Zi (Mouse) and the delivery would take place three days later.

Wang Xin carefully considered various scenarios and suddenly realized that San Tou Qiang didn't usually smoke, but he always smoked and discarded cigarette butts in the hallway after returning to the hotel. Wang Xin believed that the cigarette butts were a signal from San Tou Qiang's contact person, and they had overlooked the whereabouts of the cigarette butts while keeping an eye on San Tou Qiang. So this time, they decided to see who would pick up the cigarette butts.

On that day, San Tou Qiang was smoking in the hallway again. When the timing was right, he threw the cigarette butt down. Ma Kui and Wang Xin closely watched the spot, waiting for the person picking up the cigarette butt to appear. A woman came to pick up the cigarette butt, and Ma Kui and Wang Xin split up to chase her. They finally caught the woman, but to their surprise, it wasn't a woman, but Hou San Jin disguised as one.

Hou San Jin didn't expect to fall into Ma Kui's hands once again. He didn't want to argue and could only confess everything to Ma Kui. Hou San Jin had been deceived in his business dealings and wanted to borrow money to start over, but couldn't get any. Eventually, he got involved with San Tou Qiang in this line of work.

Hou San Jin explained that he was only responsible for helping San Tou Qiang with the shipments, while San Tou Qiang handled the contacts. The goods were given to him by San Tou Qiang and were hidden in his house. Hou San Jin confessed everything and was prepared to be sentenced to prison. However, he begged Ma Kui to help him one more time, so he could see his son.

Hou San Jin revealed that he used to have a girlfriend who was pregnant with his child. He initially wanted her to have an abortion, but it was already too late. The girlfriend gave birth to the child and brought the baby to Hou San Jin. However, seeing that the child had a rash all over his body, Hou San Jin thought the baby was sick and wouldn't survive, so he left the child on a train.

Hou San Jin revealed all these details, and Ma Kui learned that Ma Jian was Hou San Jin's son, and Hou San Jin had secretly come back to see him before. San Tou Qiang was arrested, and Ma Kui's work was coming to an end. They were about to escort San Tou Qiang back, so Ma Kui went out for a stroll in the streets of Shenzhen and bought something to bring back for Ma Jian.

When Ma Kui returned home with his purchases, he accidentally saw Niu Da Li, who was pouring sewage, and learned about Niu Da Li's activities in Shenzhen. Niu Da Li explained his work in Shenzhen and how it was profitable. He planned to save some money and start his own business.

Niu Da Li thanked Ma Kui for his straightforward advice before leaving, and he only asked Ma Kui not to tell Yao Yu Ling about what he was doing. Ma Kui escorted Hou San Jin back and made sure Ma Jian was there to see him from a distance.

Ma Kui returned to report to Captain Jiang and learned about Bao Jia Shun's escape when he was gathering information about the drug trafficking network in Ha City.