U.S. first lady Michelle Obama practices tai chi with students at Chengdu No.7 High School in Chengdu in southwest China's Sichuan province Tuesday, March 25, 2014. (AP Photo/Andy Wong)
U.S. first lady Michelle Obama, right, chats with students after practicing tai chi with them at Chengdu No.7 High School in Chengdu in southwest China's Sichuan province Tuesday, March 25, 2014. (AP Photo/Andy Wong)
U.S. first lady Michelle Obama practices tai chi with students at Chengdu No.7 High School in Chengdu in southwest China's Sichuan province Tuesday, March 25, 2014. (AP Photo/Andy Wong)
U.S. first lady Michelle Obama practices tai chi with students at Chengdu No.7 High School in Chengdu in southwest China's Sichuan province Tuesday, March 25, 2014. (AP Photo/Andy Wong)