Commenting on the increase in China's personal income tax revenue, SMU Associate Professor of Finance Fu Fangjian said that stricter and more standardised supervision of personal income tax collection in China is likely the main reason for the increase. Assoc Prof Fu said that China's personal income tax revenue mainly comes from relatively wealthy high-income groups, whose overseas investments or other income were not previously included in China's tax base. However, the Chinese government has strengthened income monitoring through big data and other technologies since last year, making the taxable income of this group clearer and thus expanding the tax base
