Why was Shuai Jiamo handed over to Jin'an Mansion in "Da Ming under the Microscope"?

Da Ming's overall score under the microscope 2023 /

Feng Biyu went to find Fang Zhixian overnight, and Fang Zhixian handed over the case of Shuai Jiamo to Jin'an Prefecture. Mao Zhixian wanted Shuai Jiamo and Feng Baoyu to burn the architecture library as an excuse. He only sent arrest documents to Deng Zhi County and Fang Zhi County, not Jin'an Mansion. Under the guidance of Cheng Renqing, Feng Biyu sneaked into the county government overnight. She put a knife on Fangzhi's neck and begged him to save Shuai Jiamo and Feng Baoyu. What a cunning person Fang Zhixian is, he has never liked to be troublesome, and the eight county magistrates have always advanced and retreated together, so he did not agree at first.

Later, Feng Biyu asked him if Maozhi County had informed him before he went to sea to arrest the documents, and reminded him that only a few other counties benefited from this matter, and they were Renhua County, which not only bore the greatest pressure, but also Maozhi County He was not considered an ally at all. Feng Biyu was taught by Cheng Renqing, which was to disintegrate the alliance of eight counties from within. After seeing Feng Biyu, the county magistrate directly handed over Shuai Jiamo's case to Jin'an Prefecture for trial.