Without a cell phone to go to the field, the trip code will not change, because the big data also needs to be based on the operation of the cell phone in order to be able to measure the user's travel track, so if the cell phone did not move, it will show no running track. So it's just that the passenger went out of town, and the phone is still local, and the movement track in the field won't show up.

The trip code will not change if you go to the field without a cell phone card, because the trip code also needs to be based on the cell phone card number to locate, if you don't have a cell phone card number with you, then there is no way to locate it accurately, so it will not show the city you have been to on top of the trip code.

The trip code is a function of a small program belonging to the client of the State Council, the use of the trip code can be queried to the individual in the domestic as well as the international travel track of the last 14 days, can be directly accurate to the province and city more than 4 hours above the region, and foreign countries are mainly able to accurately locate to which country.