Scale 1:100,000; With a transparent filter; Institute of soil survey. College of argiculture Dr. Sun Yat Sen University, Canton, China. Soils surveyed by: T. V. Tang (director), K.S..Luk, S. Hsieh and Y. M. Leu. Map prepared by H. Lo. Map redrawn by dept. of Geography and geology, hku. 1981