Tibetan gazelles are known for their heart-shaped white rear patch that serves as a means of communication. The Qilian Mountains are home to Tibetan gazelles. The vast land there offers plenty of space for them to run freely. Tibetan gazelles can run as fast as 70 kilometers per hour in the thin air. In this video, a CGTN Nature film crew takes you to see running Tibetan gazelles in Gansu Province, northwest China.