Introduction to the Yalu River, the boundary river between China and North Korea: Linjiang is an important city on the border between China and North Korea. It is separated from North Korea by a river and has convenient transportation and communications. Crossing the Yalu River Bridge in the south leads directly to Zhongjiang County, Cijiang Road in the Democratic Republic of Korea, and has opened border trade with North Korea, one-day tours between China and North Korea and other friendly exchanges.