Introduction of through train business?

Through train entry and exit service is a comprehensive convenience information service for entry and exit documents provided by the Exit and Entry Administration Bureau of Guangdong Provincial Public Security Department, including short message endorsement, progress inquiry, warm tips, entry and exit knowledge, electronic photo call and registration package. All people in Guangdong province can enjoy this service when they apply for entry and exit documents. This service is mainly used for information interaction between people and SMS platform, and free interactive use of entry-exit SMS service in Guangdong Province.