Kaesong Industrial Complex (2003-2016)
A joint inter-Korean industrial park just north of the demilitarized zone, where South Korean firms operated and tens of thousands of North Korean workers assembled goods. At its peak it accounted for a major share of inter-Korean trade.
South Korea closed the complex in February 2016 after North Korean nuclear and missile tests, ending the last major channel of inter-Korean economic exchange.
The closure showed how cross-border economic infrastructure between the two Koreas rises and falls with political relations, and how quickly a symbol of cooperation can become a casualty of tension.
Like the Yalu River bridge, Kaesong was infrastructure whose operation depended on the political climate. The new bridge's freight volumes will track the state of China-North Korea relations, not just road capacity.
