There was a Chinese belief that demons liked to travel only in straight lines. Hence the bridge zigzagged no fewer than nine times as it made its way to the center of the pond. The bridge was a demon filter, in other words, and the teahouse demon-free, which seemed of only limited usefulness if it still hosted people like Dr. X. But for Judge Fang, raised in a city of long straight avenues, full of straight talkers, it was useful to be reminded that from the point of view of some people, including Dr. X, all of that straightness was suggestive of demonism; more natural and human was the ever-turning way, where you could never see round the next corner, and the overall plan could be understood only after lengthy meditation.