Families of Chinese passengers aboard flight MH370 have demanded that Malaysian authorities to continue a search for the missing plane.

About a dozen relatives tried to send a joint petition to officers at the Malaysian Embassy in Beijing with requests to Prime Minister Mahathir Mohamad, who is due to make an official visit to Beijing starting on Friday.

Amid a heavy security presence, the demonstrators distributed their letter to some of the journalists at the protest.

In the letter, the relatives of the missing MH370 passengers asked to meet with Dr Mahathir during his visit and that Malaysian officials investigating the case travel to Beijing to give them explanations about the final report handed down on July 30.

The Remember MH370? It’s Not History event in March marked the fourth anniversary of the tragedy. Photo: Getty

The protesters urged the Malaysian government to fulfil its promise to search for the plane, along with Australia and China, and to continue with the investigations until the plane and their relatives are found.

They also asked the Malaysian government to continue pressuring Malaysia Airlines to hold monthly meetings with relatives of the disappeared as they said the frequency of such talks have reduced.

A total of 153 of the 239 people aboard the plane that went missing on March 8, 2014 over the Indian Ocean were Chinese.

Six were Australian.