There may be many reasons for the property tax rate 1%. Here are some possible reasons:

1. The policy stipulates that the government can levy a lower tax rate on property fees to reduce the economic burden of residents.

2. Tax preference: The government may give tax preference to property fees and encourage property companies to improve their service level.

3. Economic considerations: A lower tax rate may promote the development of the real estate industry and increase the supply of property services.

Please note that the above reasons are only speculation, and the specific reasons may vary according to regions and policies. If more detailed information is needed, it is recommended to consult a tax professional or a property company.