Giant pandas historical distribution

According to records of some chorographies and some ancient books, about 2,000 years ago, giant pandas have been living in most of the provinces including Hunan, Hubei, Shanxi, Gansu, Shaanxi, Sichuan , Yunnan, Guizhou and Guangxi. Due to the constant expansion of human production activities, the habitat of giant panda gradually shrank and presently they are only distributed in the southern side of Qingling Mountains, in southern part of Gansu province and in the clough regions among the high mountains in the northwest of Sichuan basin.