Is Chaoyang District Taxation Bureau of Beijing a municipal unit?

Yes According to the Beijing website, the Beijing Municipal State Taxation Bureau is vertically managed by State Taxation Administration of The People's Republic of China, People's Republic of China (PRC), and is the administrative organ that implements the administration of state tax collection within the administrative area of Beijing. The main tasks are: under the leadership of People's Republic of China (PRC) State Taxation Administration of The People's Republic of China and Beijing Municipal People's Government, to implement the national tax laws, regulations and rules, to organize the central tax revenue, to share the tax revenue between the central and local governments, to maintain and standardize the tax revenue order, and to serve Beijing's reform, opening up and economic construction.