Yalong or Ya-lung both: yä´lo͞ong´ [key], river, c.800 mi (1,290 km) long, rising in the Kunlun Mts., S Qinghai prov., W China, and flowing S across W Sichuan prov. to the Chang River near the Yunnan border. It flows through deep gorges and is one of the Chang's longest tributaries.
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