Shipping container line Hapag-Lloyd is urging customers to divert reefer containers away from the Chinese port of Dalian after it became the epicenter of China's latest COVID-19 surge.

Because of restrictions on frozen meat and seafood products arriving in Dalian firms are being advised to either divert reefer containers to Qingdao, Tianjin and other ports in China, subject to having the necessary import license for cargo, or return the reefer container to its port of origin.

"We will reserve the right to make the necessary arrangements in case we do not receive any instructions from you," Hapag-Lloyd wrote in an advisory note to customers.