This week’s devastating floods on the China-Nepal border could be a catalyst for joint early-warning systems, particularly in relation to a proposed rail link between the countries.Rescuers were still struggling on Thursday to reach Gyirong Port in the Tibet autonomous region where a mudslide struck a day earlier, following flash floods from Nepal.The port is the region’s main foreign trade gateway, which handles a third of China’s trade with its neighbour. Gyirong is also one end of a...