Dong Zhang is located on the Sino-Indian border.

Dong Zhang, the border between China and India, lies in the east of the border between China and India, a South Asian country. In the eastern section of the Sino-Indian border line, the Yarlung Zangbo River in Xizang Autonomous Region flows into India from the eastern border line, which India calls the Yarlung Zangbo River. The eastern border borders China, Xizang Autonomous Region, India and Myanmar.