Chinese Premier Li Keqiang urged progress on investment treaty negotiations and closer cooperation on energy and environment while meeting with U.S. Secretary of State John Kerry on Friday. Calling China and the United States the largest developing and developed countries in the world, Li said strategic coordination and cooperation between the two sides helps to build a new type of major-country relationship, while promoting regional and world peace, development and prosperity. "We should respect each other as equals, accommodate each other's core interests and major concerns, develop our relations and achieve win-win situations in a more pragmatic and open manner," said the premier. Regarding energy cooperation, Li urged the United States to step forward in direct exports of liquefied natural gas to China and joint exploration of shale gas. The premier also called for closer China-U.S.technological cooperation in countering climate change.