Why do shipping companies need to apply for Hong Kong unproc

The reason why we need to apply for the certificate of non processing in Hong Kong is that guests need to take the form e certificate of origin to clear customs and reduce tariffs. There is a rule in the form e certificate of origin called the principle of direct shipment, that is, in principle, if goods exported to Indonesia want to use the form e certificate of origin to reduce tariffs, the goods should be transported directly from the mainland to Indonesia without transshipment or docking, Now that the ship has been transshipped, it is necessary to apply for the certificate of non reprocessing.