Lin Qianyu. According to the data of indoor aerobics experts in China and Hong Kong, Lin Qianyu is an indoor aerobics expert in China and Hong Kong. Hong Kong, referred to as "Hong Kong" for short, is the People's Republic of China (PRC) Special Administrative Region. It is located in the south of China, east of the Pearl River Estuary, facing Macau across the sea in the west, adjacent to Shenzhen in the north and Wanshan Islands in Zhuhai in the south.