Open the WeChat applet, search and click "Follow Bid". Then choose "Don't meet" or similar options to find the "one-child card inquiry" service. Finally, follow the prompts to fill in the relevant information for inquiry. Inquire through the official account of wechat, the local health and health commission. Search the official account of WeChat, and pay attention to the health and wellness committees in your area, such as the "Shenzhen Health and Wellness Committee" on WeChat. After entering the official WeChat account, click "Newborn Health" or related menu, and select "One-Child Parents Award" to enter the query interface. Then, fill in the name, ID number and other information for inquiry. Inquire through the street government affairs hall or township family planning office. Because individuals can't directly check the one-child certificate online, they can go to the family planning window of the street government affairs hall or the township family planning office where they live. Inquire through the neighborhood Committee. You can go to the neighborhood committee where your household registration is located with your household registration book and relevant identification, and they will help you check whether you have an only-child certificate. Query the platform through the network. Log on to the official website of the local government or the website of relevant departments, and enter personal information such as name and ID number at the inquiry entrance for inquiry. Telephone consultation. Call relevant local departments, such as the Family Planning Commission or the Population and Family Planning Commission, to provide personal information for inquiry. Inquire by company. If you work in a public institution or institution, you can ask the human resources department or the relevant administrative department whether there is a record of the one-child certificate. Inquire through relatives. You can communicate with your parents or other close relatives to find out whether you have the information of the one-child certificate, and ask them to inquire about the relevant departments or institutions on their behalf.