How did the pre-service training inform you?

Family members will be informed before joining the army. After the children pass the physical examination, political examination and soldier inspection, they will be trained in isolation for 7 to 15 days before service. After preliminary understanding through pre-service training, they will gradually adapt to the life of the army, and finally, they will be assigned soldiers. They will be asked to call their parents to inform them that during pre-service training, their mobile phones will be handed over to unified management, so that parents can send their children off before departure.