At the invitation of the Chinese President Xi Jinping, President Kassym-Jomart Tokayev of Kazakhstan, President Sadyr Japarov of Kyrgyzstan, President Emomali Rahmon of Tajikistan and President Shavkat Mirziyoyev of Uzbekistan will pay a state visit to China respectively from May 16 to 20, the Chinese Foreign Ministry Spokesperson Hua Chunying announced.