 
                                Answered by ablajanj
                                    |
                                    Apr. 25, 2016 06:56
                                
                                
                                Hi, 
As John said you ca go to Turpan and stay overnight next morning you could take high speed train (only seat available), takes 4:30 hours to Liu yuan and take another vehicle to Dunhuang, takes 3hours. also you can take night sleeper train to Liuyuan (soft sleeper/hard sleeper), takes about 8 hours. From Dunuang you can take train to Lanzhou (not bullet train).
So your itinearary can be made: 
D1. arrive to Urumqi 
D2. day trip to Heavenly lake, Grand bazzar 
D3. Urumqi - Turpan, visit karez underground water system, Jiao he ruins, stay in Turpan 
D4, visit Flaming mountian, Toytrain to uk village, in the late afternoon take a night train to Liu yuan 
or 
D3. Urumqi -Turpan, visit karez, Jiao he ruins, Imin minaret, Flaming mountain, Toyuk village ( this is a bit rush but you can make it ) 
D4. in the morning take a high speed train to Liu Yuan. 
good luck!