Why can't I make an appointment for entry and exit in Guangdong?

In order to ensure public safety, large-scale booking of entry and exit documents is prohibited. According to relevant public information, in order to ensure public health and safety, Guangdong entry-exit inspection units have taken special measures to temporarily ban large-scale booking for entry-exit documents, so as to prevent the further spread of COVID-19 epidemic, reduce crowded activities and effectively prevent and control the epidemic.