The specific operation is as follows: Take Health Jining Service Number as an example: Step 1, open WeChat, find and click "Discover" in the menu bar at the bottom of WeChat page, and then click "Search" in the page; Step 2: Click the search box at the top of the search page, enter "Health Jining Service Number" in it and then click Search (you can also click "WeChat official account" in the page and enter your name to search; Step 3, then click the words "Healthy Jining Service Number"; Step 4, click "Follow" to successfully follow the official WeChat account of "Healthy Jining Service Number"; After paying attention, you can apply for an electronic health card, full-time registration of nucleic acid testing, online consultation and so on in the official WeChat account.