City Service On the pop-up page, select the city service menu on the left. Slide down, select Government Affairs, and click the the State Council option. Select the State Council client in the pop-up page and find the nucleic acid detection certificate. Before using this service, you need to log in. Click OK. Then choose to bind the mobile phone number, and choose the mobile phone number binding according to the prompt. Finally, you can enter your ID number and name, and that's it.