THE PLANE DESCENDED for a while and then made a series of turns that seemed like a landing approach. In another half hour the sun would be down, but presently the light was shining almost horizontally across the landscape below them, casting distinct shadows and throwing the landforms and buildings into relief. That it was hot and humid was obvious even from up here. The physical geography was bewilderingly complicated: a lot of multipronged peninsulas groping toward a stew of large and small islands in a sprawling bay formed by the confluence of at least two major estuaries. With the exception of some silted-in bits and slabs of artificial land around the water’s edge, the landforms tended to be steep, mountainous, and green. As they descended it became easy to pick out Xiamen, which was a generally circular island, separated from the mainland by straits narrow enough that modern bridges had been thrown across, connecting it to what looked like industrial suburbs.