My wife and I will be visiting Shanghai in November, for which we obviously have visas. Upon our return flight, we have an almost 6-hour transit period prior to boarding our international flight back home. Was wondering if it was possible to visit some sights in Guanghzou during that transit period, rather than spending it at the airport? Does anyone know of any transit tours from the airport, perhaps similar to those offered from Changi in Singapore? Any advice would be highly appreciated, thanks!