Raws li ib tug tseem ceeb ib feem ntawm cov mov saw tswj system, Khoom plays ib qho tseem ceeb luag hauj lwm nyob rau hauv txo nqi thiab lub rooj sib tham cov neeg muas zaub 'raws sij hawm thov rau cov khoom. Yog li ntawd, peb tau ua tus kheej warehouses thiab khiab tsev nyob ntev-lub sij hawm cia tso tsheb hlau luam nyob ze rau Shanghai, Qingdao uas yuav muab tau raws sij hawm thiab txhim khu kev qha kev thauj mus los cov kev pab cuam.