legal ground
Article 3 of the Provisional Regulations on Deed Tax
The deed tax rate is 3-5%. The applicable tax rate of deed tax shall be determined by the people's governments of provinces, autonomous regions and municipalities directly under the Central Government within the range specified in the preceding paragraph, according to the actual situation in the region, and reported to the Ministry of Finance of People's Republic of China (PRC) and State Taxation Administration of The People's Republic of China for the record.
Article 9
A taxpayer shall, within 10 days from the date when the tax obligation occurs, file a tax declaration with the deed tax collection authority where the land and house are located, and pay the tax within the time limit approved by the deed tax collection authority.