[1] It is 285 square kilometres (110 sq mi) long and is a tributary of Yuan River, draining an area of 6,772 square kilometres (2,615 sq mi).

The west source originates from Liping County of Guizhou, and is called Boyang River (播阳河) or Hongzhou River (洪州河).

Heading eastward, it enters the border of Hunan.

[1] The east source known as the Tongdao River (通道河) or Changping River (长平水), originates from Chengbu Miao Autonomous County, and flows northwest to Suining County, entering the territory of Tongdao Dong Autonomous County.

[1] This river flows from Chengbu Miao Autonomous County and Liping County into Gantang Town of Jingzhou Miao and Dong Autonomous County, then pasts Lianshan Township, Lincheng Town, Guangping Town, Qinglang Dong and Miao Ethnic Township, and Mobin Dong and Miao Ethnic Township of Huitong County, and feeds into the Yuan River in Tuokou Town of Hongjiang City.