In Urumqi, it is difficult to find a taxi station on street.  There is not a taxi hotline of English service in Urumqi, and it is not easy to find a taxi during rainy days, peak hours (6.00am to 9.30am and 6.00pm to midnight), weekend and public holidays.  For people who prefer to reserve everything in order ahead of time, this pre-booking service is what you are looking for.  Price is inclusive of all charges such as peak hour charges, midnight charges, city area surcharge, toll and parking fees.