9 o'clock to 17 o'clock. According to the inquiry of Xi 'an Taxation Bureau in official website, the working hours of this institution are 9:00- 17:00. Xi Municipal State Taxation Bureau (deputy department level) was established in September, 1994. It is the vertical management organization of Shaanxi Provincial State Taxation Bureau, and the functional department in charge of central tax and central and local tax collection.