Completed it already...
My timings are:
Gunagzhou - 2:00:908
Chengdu - 2:58:530
Shanghai - 1:57:830
Beijing - 2:14:938
Hong Kong - 2:12:814
If you got problems passing the stage, try using the handbrake at
the hairpins... the others just let go of the accelerator...
Good luck!
