An Lingrong would die if he ate bitter almonds because bitter almonds are poisonous. In the TV series "The Legend of Zhen Huan", bitter almonds contain toxic ingredients, amygdalin and amygdalin enzyme. When these ingredients encounter moisture, they will produce hydrocyanic acid, which is a harmful substance to the human body and can cause Poisoning, in the play, An Lingrong suffered great psychological shock and humiliation because his crimes were exposed, which made him choose to commit suicide by using bitter almonds as a chronic poison. "The Legend of Zhen Huan" is a Qing Dynasty palace battle drama produced by Beijing Television Art Center in 2011. It is directed by Zheng Xiaolong, written by Wu Xuelan (Liu Lianzi) and Wang Xiaoping, starring Sun Li, Chen Jianbin, Cai Shaofen, Liu Xuehua, Li Dongxue, Li Tianzhu, Jiang Xin, Tao Xinran, Lan Xi, Zhang Xiaolong, Lan Yingying, Sun Qian, Zhan Jingyi co-starred, and Ying Er kindly starred. The play is adapted from the novel "The Legend of Zhen Huan" written by Wu Xuelan (Liu Lianzi), telling the story of the Yongzheng period of the Qing Dynasty. The heroine Zhen Huan is drafted into the palace. In the struggle between the queen, concubine Hua and other forces, she grows up from a girl in the boudoir who is inexperienced in the world to the Queen Mother who is good at maneuvering.