During a police raid in China's Xinjiang in 1988, a rifle belonging to policeman Long Fei was taken by a terrorist after the officer was shot dead. Two months later, the terrorist used the same rifle to kill policemen Kong Yongqiang and Nurtay Anwerbeg.

This is one of many human stories in our exclusive documentary 'Tianshan Still Standing: Memories of fighting terrorism in Xinjiang.' You can watch the full documentary here.