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Group 1 - The national 1% population sampling survey aims to timely grasp changes in population development and will begin household registration on November 1, 2025 [1] - The survey will cover approximately 5 million households and 14 million individuals nationwide, with 1,600 households selected in a specific city [2] - The survey will include both family and collective households, focusing on individuals residing in the selected households as of the survey reference time [5] Group 2 - The survey will collect basic information about the population and households, including name, ID number, gender, age, ethnicity, education level, industry, occupation, migration, marriage, fertility, mortality, and housing conditions [6] - The survey reference time is set for November 1, 2025, with household registration occurring from November 1 to 15, 2025 [7] Group 3 - The survey will utilize both in-home interviews and self-reporting methods, allowing selected households to report information online via a QR code from November 1 to 5, 2025 [8][9] - Information security and personal privacy protection are emphasized, with strict adherence to the Statistical Law of the People's Republic of China during the survey process [10]