Chengdu is a great place for a 72-hour TWOV allowance, as there's quite a bit to do in the city, and there are a goodly number of daytrips that one can do and return at end of day to a Chengdu hotel to stay within the bounds of the regulation. Of China's big cities, one of my favorites. Now what we need are more intl-to-intl flight options at CTU.