That is, it is illegal to enter or leave the country without permission or valid entry and exit documents, including illegal entry and exit by land, sea, flights and ships. Smugglers are subject to criminal punishment according to law, and will be sent back to China after the punishment is completed, and they will also be punished at home, such as not being allowed to leave the country for six months to three years (legally); If the circumstances are serious, they shall be sentenced to punishment, and the "snakeheads" who engage in organizing and transporting others to smuggle shall be given more severe punishment.