Is the salary of railway freight in Urumqi higher than that in other places?

No higher than the field. According to official website of Urumqi Railway Bureau, freight back office is a hard job, which requires neither frequent business trips nor heavy physical labor. The salary is not high, and the field needs weathering. The basic salary is not high, the subsidy commission is high, and the total salary is high, so the freight back office is not higher than the field salary.