Chinese special envoy Zhang Yesui on Wednesday stressed the urgency of continuing to search with full force for missing Malaysia Airlines Flight MH370.

Search remained the top priority and must carry on unremittingly, Zhang, who is a Chinese vice foreign minister, said during a meeting here with Malaysian Prime Minister Najib Razak.

China, the envoy added, hoped the Malaysian side would strengthen information sharing with China and, in a comprehensive and accurate manner, provide Beijing with the information and evidence that led Malaysia to the conclusion that the ill-fated flight ended in the southern Indian Ocean.

Meanwhile, the Malaysian side should spare no efforts in coordinating with relevant countries to continue the search and comfort the family members of the passengers onboard the plane, said Zhang.

The envoy said Chinese leaders had been paying close attention to the incident and its latest development, and were deeply concerned about the fate of the 239 people, including the 154 Chinese, onboard the plane.

"They have instructed relevant Chinese departments to cooperate closely with the Malaysian side in the search of the missing plane and the investigation of the incident," said Zhang.

Najib, for his part, expressed his welcome and appreciation for China's support and assistance in dealing with the incident.

The premier said Malaysia would do its best to provide timely and accurate information, and concentrate their efforts on searching in relevant waters of the southern Indian Ocean.

He also promised all-out efforts in comforting the family members of those aboard the missing jetliner.

On the same day, Zhang also conferred with Malaysia's acting transport minister, Hishammuddin Hussein, as well as senior executives of the airline.