Cheng Yanqiu, a former intern at Heng Heng Law Firm and now a street vendor writing complaints at the entrance of the court, was involved in the Heng Heng Law Firm's forged evidence case due to Zhou Ziheng's receipt dispute. She cooperated with Lu Zeyan to expose the crimes of Meng Zhaohua and other partners. In the end, Meng Zhaohua was sentenced and Hengheng's license was revoked. But Meng Zhaohua left clues pointing to a deeper old case. Cheng Yanqiu and Bai Zhi continued to investigate Zhou Ziyuan's case and found forged victory records and receipt stubs in the training manual, suggesting that Meng Zhaohua had bribed Zhou Ziyuan to shut up.
