East from Yangkiang, the region stretching westward to border of the FrenchIndo-China, including Luichow Penninsular and Hainan Island is the objective ofphysiognipnical studies of this paper.
Of the total area of the Yangtze Basin (1,280,000 square km.), 400,000 sq. km.or one third lies in Szechwan.The river also receives within the province four of itseleven main tributaries: the Min, the Tou, the Kialing and the Ch'ien.
Yunnan is generally divided into three parts: the eastern, the western and thesouthern. This paper deals with the southernmost part of Yunnan, including sevendistricts lying on the frontier region immediately north of British Burma and FrenchIndo-China.
