Sanjiang£¨San River£©is located at the connecting point North of Guangxi, Hunan and Guizhou; it is an autonomous region mainly consisting mainly of Dong Ethnic Tribe, which makes up for more than 54% of the people of the whole of the county. Before entering the Ma'an Village, there is a big bridge crossing the river, The Chengyang Wind and Rain Bridge it is the best preserved Wind and Rain Bridge which contains 5 parts. Sanjiang's main attraction is the neat, indigo-clad Dong themselves, a people renowned for their wooden houses.