China has been Mongolia’s largest trading partner and source of investment for over a decade. It’s expected that President Xi Jinping’s upcoming trip to the country will result in major deals in energy and infrastructure.

Bilateral trade expanded to six billion US dollars last year, 15 times the amount achieved a decade ago. Outstanding investment from China topped 3.7 billion dollars. More than seven thousand Chinese companies are in Mongolia, including ones involved in mining, energy, construction and information technology.

Mongolian authorities say the two countries may reach deals on gas supplies and two coal factories during Xi’s two-day visit that begins Thursday.