Why doesn't Hua Tiegan eat the flesh of the blood knife bodhi old zu?

Because the internal force of huatie is exhausted.

Hua Tiegan is a character in Jin Yong's martial arts novel Liancheng, and the blood knife bodhi old zu is the villain in the novel. In the novel, Hua Tiegan and the blood knife bodhi old zu fought in the snow valley near Tibet. Hua Tiegan survived, but because of the exhaustion of internal force, he could not confront the bodhi old zu with the blood knife. So Hua Tiegan didn't eat the flesh of the blood knife bodhi old zu. Liancheng Tactic is an early martial arts novel of Jin Yong, which tells a series of stories that happened during the process of the protagonist Di Yun competing for Liancheng Tactic, a martial arts secret book.