Can't find any files. Now subways are all automatic doors, and even veterans' discount cards can't be recognized, so it's because they can't recognize any documents. Nanning, referred to as "Tancheng", also known as Greentown and Tancheng, is the capital of Guangxi Zhuang Autonomous Region. Nanning is located in the south of central Guangxi, facing Southeast Asia, backed by southwest China, bordering Guangdong, Hong Kong and Macao in the east and Beibu Gulf in the south.