Zhu Yi Pin licks the Yunnan ham hanging in the kitchen. He finds that the taste of salt and the taste of Su Zhen's body is exactly the same. The murder weapon that killed Su Zhen is ham. The crime scene is this kitchen. After Mr. Cui killed Su Zhen with the ham, he used the special bath beans in the kitchen to wash off the grease on Su Zhen's head and changed into clean clothes. That's why Su Zhen's clothes are tied in the opposite direction. (Source: Viu)