South flows through Xiawa, reaches Okoba, and accepts Le Aixi. After passing through Xiaoguchang, Shang Tao, Bawei (the resident of the cooperative village committee) and Guxian Daan Township, we accepted Zhongtianxi in He Long Village, Tang Fang Village. After the Tang and Song Dynasties, the section of Dahuanjiang from Yong 'an to Daan Township and Longtun was called Daixi. Then it flows south through Shangtangfang, Heping, and next week to Sakhali (the resident of Tang Fang Village Committee), where it meets Tongyinggou at the ferry. It flows into Sien Town via the Upper Wujiang River and the Lower Wujiang River, and passes through the village slips, Shangji, Temple Back, Tangji, Xiajiu, Geography, Shanglile and Xialille in Zhongshan. Turning eastward, the river flows into Da 'an Township, and the river flows into Lujiatan (commonly known as "Tan Lun"), forming a vast abyss. This swimming pool is the largest in the county. It flows east to the south of Baxi Mountain, passes through Shangbanliu, Shangdi Cliff and Xia Di Cliff (the resident of Daan Village Committee), and connects with Daan River at the ferry. Turn south and flow south through Xiabanliu, Dio and Xiahuantun. Re-enter Sien Town and pass through Huaou, Lixin, Tommy Tam, Liangsan and Chencha to accept Shimengou. It flows west around Huanjiang County, crosses Huanjiang Bridge, accepts Sanlexi, then flows around the south of the city, crosses Oujia and flows into Guantangtan. It passes through Xiangang, Pofu, Longjiao, Shanggan, Weiting, Xiagan, Xiashe, Xia Xiang (resident of Long Fu Village Committee) and Xia Xiang Power Station, passes through Xia Liang, and leaves Huanjiang County via the east of Neiweitun. The inland river length of Huanjiang Maonan Autonomous County is147.2km, which is the largest river in Huanjiang County.
In Hechi City, Yongxing Village in Yujiang Township of Dongjiang River flows into the urban area near Aotun and into Longjiang River near Fulaitun in Dongjiang Town. The length of Hechi City is only 9.82 kilometers, and the rainwater collection area is 30.5 square kilometers.