Who is Yu Zecheng mentioned by Feng Gong in the sketch of Spring Festival Evening?

He used to be a school-level officer in Chongqing, and then went to Nanjing to assassinate traitors with his boss Lu Zongfang (* * * underground intelligence agent of the production party). I don't want Yu Zecheng to be exposed after completing the task alone, be hunted down, and be saved by the producer of * * * in an emergency. Yu Zecheng knew that the military spy leader provided weapons to the Japanese to transport private property, and he lost trust in the Kuomintang. Coupled with the influence of his fiancee Zuo Lan, Yu Zecheng decided to secretly join the producer of * * * and go back to Chongqing to lurk. As a hero, Yu Zecheng was awarded a prize and sent to Tianjin Intelligence Station. After clever handling, he saved the day several times, and successively replaced the captain of the intelligence station action team and the director of the intelligence department, Lu and others, and was promoted to deputy stationmaster. On the eve of liberation, Yu Zecheng, who was full of expectations, was dragged to Taiwan Province by the stationmaster to continue to lurk.

This is a bloody, caring and humanized hero. He will take the initiative to take off the stumbling block, read Zuo Lan's diary again and again and miss her; He would tear up the newspaper nervously while waiting for news, he would be paralyzed after hearing the news of the Kuomintang's "occupation" of Yan 'an on the radio, and he would go to the liaison station in a panic to ask about the situation.