As Zhou Yifeng and his colleagues investigated, Zhou Yiran studied abroad before and returned to Zhengcheng the year before. The leader of the group wants the adopted son to take over, and regards him as the number two person of the group, code name Lao Z. Although Zhou Yiran respected his adoptive father and appreciated his upbringing, he was very resistant to his business. This time, he was ordered to come to the capital, which was helpless. However, he did not know that this was a bureau set up by his adoptive father. When he came here, people inside the group thought he was coming to Beijing to do business. In their opinion, it must be a big deal for Old Z to come out in person. After getting the news, the undercover told Zheng Cheng's Drug Enforcement Department about Old Z's coming to the capital