East China's Qingdao, one of the world's busiest ports, has seen unprecedented large quantities of crude oil tankers waiting for days to be unloaded, which is caused by importers rushing to stockpile oil as prices are on the rise.

More than ten tankers were anchored off Qingdao port each day, waiting to dock, according to Su Peng, an official with Qingdao Shihua Crude Oil Terminal Co.

The oil pipeline linking Huangdao in Qingdao and the neighboring city of Weifang is working at its maximum capacity of 45,000 tonnes a day, 112.6 percent more than last year.

The monthly transport of oil away from Qingdao by road has been raised to one million tonnes from 600,000 tonnes the same period last year. The railway has seen 25.4 percent higher operation than last year.