Source: Xinhua| 2020-06-02 11:11:06|Editor: huaxia LANZHOU, June2 (Xinhua) -- Chang Zhizhao turns on the camera on his smartphone, performs a Changquan routine and posts it online. Little did he know it would end up having such a wide reach. The 28-year-old Chang, who owns two world Changquan titles from the 14th World Wushu Championships and the 2nd Taolu World Cup respectively, is a martial arts teacher in the Department of Physical Education at Lanzhou University. Since the outbreak of COVID-...