摘要: Guilin area is situated in the northeastern part of the Guangxi Zhuang Autonomous Region, 110°9′to 110°42′E and 24°40′to 25°40′N. It has a subtropical monsoon humid climate characterized by sharp contrast between dry season and rainy season, with an annual mean temperature of 18.3℃ and precipitation of 1936mm, which coincide with the thresholds of temperature and precipitation for tropical karst.