Asian regional container operator Interasia Lines has returned to the shipbuilding market, signing a contract with Jiangsu YangZiJiang Shipbuilding Group (YZJ) for up to eight 2,900 teu vessels.

The order includes six firm newbuilds and two optional units, marking Interasia’s first collaboration with YZJ. Financial terms have not been revealed.

The newbuilds are designed to improve operational efficiency and sustainability, aligning with industry efforts to reduce environmental impact and part of the broader strategy to expand the fleet and strengthen the footprint in the Intra-Asia shipping market, the company said.

The vessels are scheduled for delivery in 2028, boosting Interasia’s current fleet of more than 20 boxships.