After studied the two citys development, I think it is could be worth to compare Shiyan City with Kiruna City. Their way of development are similar. One was appeared with track industry and the other is developing with mining. One is extending to the industrial heritage, the other one is submerged by the mining expand. We could get some useful predict from Shiyan. Maybe after several years exploited, the underground of kiruna will be empty and the city will be no longer rely on the mining for economic growth. What is the direction of the city after that?