President Xi Jinping will chair the China-Central Asia Summit on May 18 and 19 in Xi'an, Shaanxi province, Foreign Ministry spokeswoman Hua Chunying announced.The summit will bring together President Kassym-Jomart Tokayev of Kazakhstan, President Sadyr Japarov of Kyrgyzstan, President Emomali Rahmon of Tajikistan, President Serdar Berdimuhamedov of Turkmenistan, and President Shavkat Mirziyoyev of Uzbekistan, she said.