Click external data source. The library of Guangdong Provincial Sun Yat-sen Library can access HowNet literature and click on external data resources. Guangdong Province is located at the southernmost tip of Chinese mainland. It borders Fujian in the east, Jiangxi and Hunan in the north, Guangxi in the west and the South China Sea in the south. The east and west sides of the Pearl River Estuary border Hong Kong and Macao Special Administrative Regions respectively.