China's tax authorities are intensifying oversight of residents' overseas income, with backdated tax collection extending to 2017. This initiative primarily targets unreported income from 2022 to 2024. Utilizing the Common Reporting Standard (CRS) for information exchange, which began in 2018 with data from 2017, and leveraging tax big data, authorities can efficiently identify non-compliance. Individuals are required to declare and pay taxes on global income, with penalties, interest, and fines applicable for violations. In certain cases, there is no statute of limitations on enforcement. Taxpayers are advised to review past income, voluntarily report to minimize costs, and seek professional advice to navigate the heightened regulatory environment.