Hong Kong liner company OOCL has signed up for seven more 23,000-teu containership newbuildings at two Chinese shipyards.

Dalian Cosco KHI Ship Engineering Co (Dacks) will build four vessels costing $157.71m each, while Nantong Cosco KHI Ship Engineering Co (Nacks) will construct three ships costing $157.68m apiece.

They are slated for delivery between the third quarter of 2023 and the third quarter of 2024.

The septet is believed to be costing OOCL an additional $2m per ship above the cost of five similar vessels it ordered at the two shipyards in March.