Finally i finished my dream trip to Tibet and came back in one piece. It's really a fantastic trip with best timing and people. We all are fit enough to handle it! We have taken all different kinds of transportation(flight, train, jeep, horse riding, bicycle...). The hardest part is the 3000km Jeep and we faced all kinds of weather within 6hours.(Sunny day, Heavy rain, ice piece, snow). Also I have reached the highest place (5380m) that my body can afford without bringing the oxygen bag.
Here's our route:
QingHai(Xining) -> QingHai (GeErMu) -> Tibet (Lasa) -> Tibet (Everest Base Camp) -> Tibet (NamTso)

I will post the full set of voyage later on. (Need some times to organize it... have 5 Gb photos)