The border is long. From west to east, the Yalu River, Paektu Mountain, and the Tumen River divides the two countries. Dandong, in the LiaoningProvince of China, on the Yalu River delta, is the largest city on the border. On the other side of the river is the city of Sinuiju in North Pyongan Province, North Korea. The two cities are situated on the Amnok river delta at the western end of the border, near the Yellow Sea. Their waterfronts face each other and are connected by the Sino-Korean Friendship Bridge. There are 205 islands on the Amnok River. A 1962 border treaty between North Korea and China split the islands according to which ethnic group were living on each island. North Korea possesses 127 and China 78. Due to the division criteria, some islands such as Hwanggumpyong Island belong to North Korea even though they are on the Chinese side of the river. Both countries have navigation rights on the river, including in the delta. The source of the Amnok River is Heaven Lake on Paektu Mountain, which is considered the birthplace of the Korean and Manchu peoples. This lake is also the source of the Tumen River which forms the eastern portion of the border. There are a significant number of ethnic Koreans in Northeast China, particularly in the Yanbian Korean Autonomous Prefecture.
Trade and contact
Its border with China has been described as North Korea's "lifeline to the outside world." Much of the China-North Korea trade goes through the port of Dandong. Chinese cell phone service has been known to extend as far as into Korean territory, which has led to the development of a black market for Chinese cell phones in the border regions. International calls are strictly forbidden in North Korea, and violators put themselves at considerable peril to acquire such phones. Tourists in Dandong can take speedboat rides along the North Korean side of the Amnok River and up its tributaries. A common wedding day event for many Chinese couples involve renting boats, putting life preservers on over their wedding clothes, and going to the North Korean border to have wedding photos taken. Memory cards and teddy bears are reportedly among the most popular items for North Koreans shopping in Dandong.
Crossings
Border security
The 1,420 km border between North Korea and China has been described as "porous". Many North Korean defectors cross into China. The Chinese government transferred responsibility for managing the border to the army from the police in 2003. Chinese authorities began building wire fences "on major defection routes along the Tumen River" in 2003. Beginning in September 2006, China erected a fence on the border near Dandong, along stretches of the Yalu River delta with lower banks and narrower width. The concrete and barbed wire fence ranged in height from to. In 2007, a U.S. official stated that China was building more "fences and installations at key border outposts". In the same year, it was reported that North Korea had started building a fence along a stretch of its side of the Yalu River, and had also built a road to guard the area. In 2011, it was reported that China was building fences high near Dandong, and that of this new fencing had been built. It was also reported that China was reinforcing patrols, and that new patrol posts were being built on higher ground to give wider visibility over the area. According to a resident of the area: "It's the first time such strong border fences are being erected here. Looks like it is related to the unstable situation in North Korea." The resident also added that previously "anybody could cross if they really wanted" as the fence had only been with no barbed wire. In 2014, an Australian journalist who visited Dandong reported a low level of border security. In 2015, fencing was reported as the exception rather than the rule. In 2015, a photojournalist who traveled along the Chinese side of the border commented that fencing was rare and that it would be easy to cross the Amnok river when it was frozen. The same report noted friendly contact between people on opposite sides of the border. In 2018, a photojournalist drove along the border and described it as "mile after mile of nothing, guarded by no-one". In 2015, a single rogue North Korean soldier killed four ethnic Korean citizens of China who lived along the border of China with North Korea. Rumours of Chinese troop mobilizations on the border frequently circulate in times of heightened tension on the Korean peninsula. According to scholar Adam Cathcart, these rumours are hard to substantiate and hard to interpret. A leaked China Mobile document that went viral on Chinese social media on 7 December 2017 allegedly revealed Chinese government plans to construct five "refugee settlement points" along the border to North Korea in Changbai county and Jilin province. This was apparently in preparation for a large influx of North Korean refugees if the Kim regime collapsed in a potential conflict with the United States. The Guardian quoted the document: "Due to cross-border tensions … the party committee and government of Changbai county has proposed setting up five refugee camps in the county."
