Half a year. Courier refers to the personnel who use special tools, equipment and application software systems for express delivery to engage in receiving and sending, sorting, sealing, transportation, delivery, information entry, inquiry, market development and handling difficult express mail at home, internationally and in Hong Kong, Macao and Taiwan. * * * There are five levels, namely level 5/junior worker, level 4/intermediate worker, level 3/senior worker, level 2/technician and level 1/senior technician. The half-year training period for couriers is half a year.