The practice of setting up a shell company to legally reduce the tax burden of a company is widely used in some countries and regions, and is usually called tax planning. The following are some well-known countries and regions suitable for setting up a shell company: 1. **Cayman Islands**: There is no corporate income tax, the company establishment procedure is simple, and confidentiality is strong. 2. **British Virgin Islands**: There is no corporate income tax, shareholder information is not public, suitable for asset protection. 3. **Bahamas**: There is also no corporate income tax, suitable for investment and financial management. 4. **Singapore**: The tax rate is low, and it is welcoming to foreign investment, which is conducive to international business activities. 5. **Ireland**: The corporate income tax rate is low (12.5%) and attracts foreign direct investment. 6. **Luxembourg**: The tax rate is low and there are flexible corporate structure options. 7. **Hong Kong**: Only income from Hong Kong is taxed, the tax rate is low, and the company establishment procedure is simple. 8. **Malta**: There are favorable tax policies, especially in terms of foreign investment. 9. **Dubai (UAE)**: Companies registered in specific free zones can enjoy zero tax rates. It should be noted that although these countries and regions offer tax incentives, the establishment of a shell company must comply with local laws and regulations and avoid being considered as tax evasion. In addition, international supervision of tax avoidance and money laundering is becoming increasingly stringent, and companies need to carefully consider and comply with regulations when using these strategies. It is recommended to seek advice from professional tax and legal advisors.