Chinese President Xi Jinping arrived in Ulan Bator on Thursday for a two-day official visit, Xinhua news agency reported, according to dpa. Xi is the first Chinese head of state to visit Mongolia in 11 years. China has been Mongolia's largest trade partner for more than a decade, accounting for goods worth nearly six billion dollars in 2013, up from 324 million dollars in 2002, Xinhua reported. The 2013 figure represents more than half of Mongolia's total foreign trade.