U can consider Sichuan province with Chengdu as base..
I station myself at a hostel, sign up de local tours and self go, there are a lot of places u can cover in 2 weeks, given that china visa is valid for 15 days..
Places around include qingcheng mountain, dujiangyan, leshan, emei, siguniang, jiuzhaigou, hailougou, pandas and Tibet..
I went to at least 7 places listed above, in total Accomodation n flights, tours, train tickets all addsmupmto 1.6k for 2 weeks.