Western hubei and eastern chongqing region lays southeast border of sichuan basin with its area about 9500 km2 . qiyue mountain anticlinal structure is on the east of it and changjiang river on the west of it 鄂西渝东区位于四川盆地东南缘，齐岳山背斜带以西，长江以东，面积约9500km ~ 2 。
