The goal of comprehensively promoting the construction of an upgraded version of internal control mechanism informatization is to achieve "two coverage, two optimization and two promotion". "Two Coverages" means that the internal control mechanism covers not only State Taxation Administration of The People's Republic of China and provincial tax bureaus, but also city and county tax bureaus; It not only covers the whole process of tax law enforcement, but also covers all fields of administrative management. "Two optimizations" means optimizing the process system and optimizing the internal control function of tax business software. "Two upgrades" means improving the ability of internal control and supervision, improving the overall efficiency of internal control, promoting clean and lawful tax administration, and helping the early realization of tax modernization.