China will further relax controls on market access and shorten the negative list for foreign investment, said Chinese Premier Li Keqiang Thursday.

Li made the remarks at the opening plenary of the Boao Forum for Asia (BFA) annual conference in Boao, a coastal town in southern island province of Hainan.

By the end of June, China will revise and issue the negative list for foreign investment, the negative list for foreign investment in the FTZs, and the foreign investment guidance catalog, Li said.

China will shorten the negative list and further open up to foreign investment the industries including value-added telecom service, medical institutions, education services, transportation, infrastructure, and energy and resources, Li said.

China will also facilitate trade by lowering the cost and improving the efficiency of custom clearance, said the premier.

"We shall treat enterprises of all types of ownership equally, and ensure fair play and common development among Chinese and foreign businesses with impartial supervision," Li said.