청천강의 길이는 얼마인가?
The Ch'ŏngch'ŏn is a river of North Korea having its source in the Rangrim Mountains of Chagang Province and emptying into the Yellow Sea at Sinanju. The river flows past Myohyang-san and through the city of Anju, South P'yŏngan Province. Its total length is 217 km (135 mi), and it drains a basin of 9,553 km2 (3,688 sq mi).
217 km (135 mi)