The world's first liquefied natural gas (LNG)-powered support vessels equipped with four sets of intelligent systems were delivered in eastern China's Nantong City on May 28. The vessels were solely designed and built in China, marking a milestone in the country's green and digital development of offshore oil equipment. The "Offshore Oil 542" and "Offshore Oil 547" are specially designed to provide support services for the country's offshore oil and gas transportation, including monitoring, cargo shipment, rescue and external fire fighting services. China is the world's first to use such intelligent LNG-powered support ships for offshore oil exploration.