1. Steels with a diameter or thickness of less than 30 mm and thin plates with a thickness of less than 4 mm shall be delivered in bundles. Each bundle shall be the same batch number. Each bundle shall be affixed with at least two signs. 2. After the steel is packaged (or not supplied in bundles), it must be painted according to the relevant standards. 3. bundles of steel for delivery, each bundle should be bundled with wire at no less than two places.