There are many. For starters, Hongkong, Macau, Beijing, Chengde, Chengdu, Chongqing, Dali, Dalian, Dunhuang, Emeishan, Guangzhou, Guilin, Hangzhou, Harbin, Huangshan, Jinan, Jiuzhaigou, Kaifeng, Lhasa, Lijiang, Luoyang, Lushan, Nanjing, Shanghai, Suzhou, Wuxi, XiAn, Xishuangbanna, Yangzhou, Zhouzhuang, Zhuhai. I would say that Beijing, Xian, Hangzhou, Suzhou, and Hong Kong are must sees.