In which episode did the detective captain discover the child in the hotel?

The detective captain found his daughter in episode 31.

Qiu Bing made an excuse and asked Wang Xia's mother-in-law, Chen Daqiang, to come to the Public Security Bureau to register information and bring Wang Xia with her. Unexpectedly, Chen Daqian used the excuse that Wang Xia was sick and did not bring her there. Qiu Bing was very anxious. Gu Ming asked Qiu Bing not to worry about it, but to act calmly. Qiu Bing came to the village to inquire about the situation on the pretext that she was from the Family Planning Commission. Qiu Bing saw that Chen Dakui was planning to move Wang Xia, and recognized that this was his sister Lanlan, who had been separated for thirteen years. Lan Lan cried and said that she refused to leave, and that she was not their daughter-in-law. Qiu Bing rushed up and pulled Lan Lan away, and all the men in the village came out to stop Qiu Bing from taking Lan Lan away. Fortunately, Lin Zhihua rushed to the scene at this time and desperately took Qiu Bing and Lan Lan out of the village. Gu Ming received the news that Qiu Bing's father suddenly fell ill and was hospitalized. Qiu Bing took Lan Lan to visit his father.