Jasi came to the Ministry of Punishment happily and said that Du Ruofei's method was effective and Mr. Li's condition was significantly relieved.Jasi brought domestic water from Li's house, and after Du Ruofei's test, he found that only the well water specially used by the young master contained silver nitrate.Du Ruofei confidently said that there was a way to synthesize silver nitrate.Du Ruofei gave Xun Changhao, Jiang Lanting and Gu Mochou a small class to explain the chemical equation of silver nitrate. The three of them were confused.Xun Changhao confessed to Du Ruofei that he knew she was having secret dealings with Ning Ji, and reminded Du Ruofei to be careful of Ning Ji.Du Ruofei believed that Gu Mochou was Xun Changhao's true love. Thinking that she could wake up, she felt not only unhappy but also panicked.Ning Ji knew that the revenge plan had reached a critical moment and was worried about his wife's safety and asked her to leave. Mrs. Ning vowed to accompany Ning Ji to the end.Du Ruofei asked Wei Songquan to tell Xun Changhao to go home from get off work early, saying that he had something to tell him.Xun Changhao returned home happily, but found that Gu Mochou was waiting for him.