Replacement of the child to check the trip code is as follows:

Replacement of the child's trip code, if the child's age is not very big situation, has been following the parents, then directly show the adult's trip code can be. If the child has their own cell phone card can be in the check trip code when entering the child's cell phone number to receive SMS verification code, to check the child's trip code! Preschoolers generally have a parent's trip code when entering or leaving a public ****ing place.

Travel code

Communication big data travel card, is by the China Academy of Information and Communication Technology, China Telecom, China Mobile, China Unicom three basic telecommunications enterprises using cell phone "signaling data", through the user's cell phone is located in the location of the base station to obtain for the country's 1.6 billion mobile phone users free query service. The query service is provided free of charge to the 1.6 billion cell phone users, and the cell phone users can query the information of all the cities and towns that they have visited in the previous 14 days through the service.

The "Communication Big Data Trip Card" analyzes "cell phone signaling data", which is obtained through the base station location of the user's cell phone, and the collection, transmission and processing of signaling data are automated, with strict security and privacy protection mechanisms, and the query results are available in real time, convenient and fast. The query results are available in real time, convenient and fast.

The data on the "Communications Big Data Trip Card" can be used nationwide, truly providing comprehensive coverage of the whole country on one network, and it can also be used to inquire about the international trips of one's domestic cell phone number.