C1956 You will also Believe the Vow I Made

Of course, what Gao Fei injected Mr. Yamaguti with wasn't poison.

It was a kind of poison that could make one's heart stop beating slowly, just like how it was normal to die naturally. No matter how advanced the investigation technique was, it was impossible to find out what kind of herb it was. It came from Underground Loulan, and it was concocted by Moxie Zhengdong