The rainstorms have gone from Beijing but the air is still hot and humid, so that moving around in the city feels like walking through a steam bath. By 10am on Thursday, a couple of exhausted food delivery drivers were already stretched out on a bench across the road while a street sweeper swung her giant broom in the gentlest adagio. The news was still full of stories about surviving the floods that followed Tropical Storm Doksuri, which last Saturday brought the heaviest rainfall Beijing has seen in a single day in at least 140 years. The rain was still...