Daba Mountains
On the south and southeast, the Sichuan Basin is flanked by the Yungui Plateau. Mountain ranges here include the Wulian Feng and Dalou Mountains. Lastly, the Sichuan Basin is separated from the traditional heartland of China to the east and northeast by the Wu Mountains and Daba Mountains. The Daba, a southern subrange of the Qin Mountains, has long been a barrier to travel between the Sichuan Basin and the rest of China.