4 hours. "trip card" (also known as trip code), the official name for the "communication big data trip card", is guided by the Ministry of Industry and Information Technology, China Academy of Information and Communications Technology, China Telecom, China Mobile, China Unicom *** with the launch of the trip query service. According to the trip code update rules show that the trip code domestic accurate to the province and city stay more than 4 hours will be recorded, so Hebei's trip code to Shanxi village inside 4 hours can change the trip code. Open your own Alipay, then search for trip code query in the homepage, then click on the immediate query trip code. After that, enter your cell phone number verification code and click Query Now to see the trip code.