I'm in the Jing - Beijing. Hong Kong is spectacular - protected from the 'events' of the past 100 years that reduced so much of China to a souless mass of concrete towerblocks - you'll find it much more 'Chinese' than China itself.
Chengdu is one of my favourite Chinese cities though - make sure you get up to Jiuzhaigou in the north! What are you doing up there? 你中文说得怎么样?