According to the "Implementation Opinions of the General Office of Tianjin Municipal People's Government on Further Deepening the Regulation of the Real Estate Market in Our City" issued by the General Office of Tianjin Municipal People's Government on March 3, 2065438, non-registered households in this city need to provide proof of continuous payment of social insurance or personal income tax for more than two years in this city within three years. The paid social insurance or personal income tax certificate shall not be used as a valid certificate for purchasing a house. If there are overdue payments due to job changes and other reasons, and the number of overdue months in 24 months does not exceed 3 months, it is regarded as continuous payment and can be used as a valid purchase certificate.