As early as 736, granaries were built at critical points along the route from Yangzhou to Chang'an, which eliminated shipment delays, spoilage, and pilfering.
Semenjak tahun 736, lumbung-lumbung telah dibangun di titik-titik penting di sepanjang rute dari Yangzhou ke Chang'an, sehingga menyelesaikan masalah penundaan pengiriman, kerugian, dan pencurian.