BEIJING, May 30 -- Chinese President Xi Jinping on Friday urged Malaysia to come up with an improved search plan for the missing Malaysia Airlines jet MH370.

"We expect Malaysia to coordinate with related countries to formulate and improve the plan for the search and post-incident issues and keep the search going in a bid to find the jet at an early date," Xi told visiting Malaysian Prime Minister Najib Razak.

Xi reviewed the resources Malaysia, Australia and other countries have devoted to searching for MH370 and comforting families of the passengers on board since the plane went missing on March 8 en route from Kuala Lumpur to Beijing.

Najib, who is on a six-day official visit to China, characterized this as a rare tragic incident in the history of global aviation and pledged all-out efforts to find out what happened to the aircraft.

He underscored his country's commitment to working closely with China and other countries.

Najib started his China visit on Tuesday in Xi'an, capital of northwest China's Shaanxi Province. On Thursday, he had talks with Chinese Premier Li Keqiang.