The Công River ( vi, Sông Công) is a tributary of the
Red River in northern
Vietnam. It flows through
Thái Nguyên Province
Cài () is a Chinese-language surname that derives from the name of the ancient Cai state. In 2019 it was the 38th most common surname in China, but the 9th most common in Taiwan (as of 2018), where it is usually romanized as "Tsai" (based on ...
. The river is 96 km in length and has a catchment area of 951 square kilometres. It flows from
Núi Cốc Lake and also passes through the town of
Sông Công
Sông Công is a Provincial city (Vietnam), provincial city (''thành phố'') of Thái Nguyên Province in the Northeast (Vietnam), north-east region of Vietnam. Song Cong city is currently a Class-3 city. As of 2018 the city had a population of ...
.
Rivers of Thái Nguyên province
Rivers of Vietnam
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