please advised me . the weathet condistion of travil khanjrab to altay city to oskemen city

Sir I live at Lahore city (( Pakistan ) I have one invitation letter for visit of Kazakhstan 60 days . I want to travil through China . please advise me the easy rout and low cost price . for bus and train route and also please advised me the condition of weather. I want to travel mid of February 2016 .