ASTANA, June 18 (Xinhua) -- Chinese President Xi Jinping concluded on Wednesday his three-day trip to Astana, the capital of Kazakhstan, where he attended the second China-Central Asia Summit.

XINING, June 18 (Xinhua) -- A new study has unveiled the key mechanism for alpine grassland carbon sink on the Qinghai-Tibet Plateau in western China, providing scientific underpinning for ecological ...