Medical Shop Season 2 Episode 12

Zhu Yi Pin lies to Third Young Master that Zheng Zai Nong is his life-saver, and if he can help him find Zheng Zai Nong, he will give him a treasure. Third Young Master falls for it and offers to take Zhu Yi Pin to Zheng Zai Nong. However, the truth is that the Third Young Master has already seen through Zhu Yi Pin, as he brings the latter into the middle of nowhere and is going to kill him. Zhu Yin Pin gets away in time, though he's still injured when someone throws an unidentified explosive at him. Fortunately, he is found by Liu Song, who takes him home to Zheng Residence. Liu Ruo Xin and the others still think Liu Song is the traitor, but Zhu Yi Pin tells them that he saved his life and lets him tell them the truth. It turns out that Liu Song's letter is to his family because he is homesick. He lives in the East Gate district in the capital, which explains the word 'East' seen in his letter. (Source: Viu)