In the "Ending the Chinese Fir Project", Miss Xi wore toxic lipstick. In order to cooperate with the CIA in arresting Xiao Zhengguo, He Na deliberately approached him at the dance and kissed Xiao Zhengguo with a highly toxic lipstick, which led to Xiao Zhengguo's coma. He Na's plan is to flee to the United States with information during Xiao Zhengguo's coma, in exchange for freedom and security.

"The Tail-fir Project" tells a series of tragic events in Guilin, Guangxi, China caused by the poisonous gas left by the Japanese biochemical troops during World War II. China's anti-Japanese soldiers and civilians fought back and fought to the death with the Japanese army.