At present, many enterprises, joint education authorities and schools have launched home-school-link products, which are mainly used for student attendance and simple monitoring, and their products use RFID technology. Family

　　The working mode of Xuetong is that each student is equipped with an RFID card. When students enter the school gate, they do not need to take out the card from their schoolbag. The RFID reading and writing equipment at the school gate can read the student's information and send the students to the school The message immediately informs parents that the child has arrived at school. When the get out of class is over, when the students pass the school gate, the system will notify the parents of the normal dismissal information of the students. The system will also send a message notification once a student leaves the school during class. Due to its successful operation mode and low cost, the Home-School Link product has been vigorously promoted in schools all over the country. However, there are two problems in the current home-school link. First, the whereabouts of students when they leave the school cannot be obtained; second, students can only obtain information about students going to school and leaving school when they walk out of the gate. Road, there is often the phenomenon of overturning the wall, which cannot be solved by home-school communication. The current problems of home-school communication can be easily realized by GPS tracker. Whether students are on campus or leaving campus, parents can monitor in real time; no matter whether students enter or leave the gate, as long as they leave the school area, the device will send an alarm message.

　　At present, my country is vigorously carrying out a special campaign to rectify pornographic and vulgar information on the Internet and mobile media. The harm of Internet pornography has now become an international issue. The United States, Germany, Japan, South Korea, Singapore and other developed Internet countries are facing challenges together and taking measures to combat Internet pornography. Internet pornography is abhorrent, and it is even more difficult to prevent Internet pornography from invading mobile phones, which is undoubtedly a threat to students with poor resilience. Due to the low cost, privacy and ease of use of mobile phone transmission, individual users can easily share pornographic content with others through SMS and MMS. It is in this context that students are more likely to be tempted by mobile phone pornography, and it is far more difficult to supervise students to use mobile phones to surf the Internet than to use computers to surf the Internet. Mobile Internet access cannot be well monitored. If the parent cancels the Internet access function of the child's SIM card, but the child will buy another card, the Internet can still be accessed, and mobile phone pornography cannot be prevented from the source. GPS trackers are different from mobile phones. Although they can transmit data and make calls, they cannot dial freely or browse web pages. The functions of many mobile phones are limited, which can prevent the poisoning of children from the yellow peril of mobile phones, and also reduce the number of students because of The phenomenon that playing with mobile phones affects learning.

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