Chen Shan calls Liu Fen Fang to move the medicine, but he didn't hear clearly and calls Zhang Li. Chen Shan gets Qiao Yu to mislead the Japanese, but the Japanese aren't fooled. Mr. Chen admits to dealing drugs. The Japanese decipher the code and send Chen Shan to find the medicine. Then the Japanese find Chen Shan suspicious and give the assignment to Qiao Yu. Liu Fen Fang moves the medicine just in time, but leaves behind some evidence. (Source: jindreame at MyDramaList)