The top leaders of China, Russia and Mongolia launched a three-party summit on Thursday, during which President Xi Jinping proposed a three-way economic corridor featuring cross-border infrastructure and trade development.

Calling their development highly complementary, Xi called for an economic corridor linking Beijing's proposed Silk Road economic belt, Russia's Trans-Eurasia railway and Mongolia's passage to grassland initiative.

They should also beef up interconnectivity by railway and road, facilitate customs clearance and study the construction of cross-border power grids, Xi said at the meeting on the sidelines of the Shanghai Cooperation Organization summit in Dushanbe, Tajikistan.