What does it mean to have a blue circle on the driver's head?

Open the e-driver app through the guide, first register, fill in personal information, real-name authentication, driver's license authentication, and a series of operations. After that, the system will display a notice that the data has been successfully submitted. In these two days, e-driver sent a text message saying that the preliminary test materials had passed, and he wanted to interview, bring his driver's license and ID card and interview at the given time and place.