The school requires students to send out their own health codes in the group every day. If they go out, your health code will be marked. Some schools may ask you to send a password, which will appear anywhere you have been.
In the era of big data, everyone's itinerary is not a secret. Because no matter by car, boat or plane, you need to buy tickets from the real-name registration system registration system. As long as you buy a ticket, your name has already entered the network. Even if your family travels by car, taking high-speed payment will leave traces. Besides, when you go to school, your whereabouts are clear at a glance.
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Moreover, during the epidemic, the school refused to let the school go out for the sake of students' safety. After all, there are few people who keep in touch with the school and the chances of infection are small. After leaving school, I pass so many people and places every day, which invisibly increases the chance of infection. Relatively speaking, it is better to stay at school until the epidemic is over. This is the only thing you can do now, for yourself, for your family, for your country and for the world!