Last November, shortly after the CBA season started, the American player Von Wafer from the Xinjiang team came to see me for help.  This former teammate of Yao Ming from the NBA team, the Houston Rockets, at 1.96 meters, was an aggressive guard, but when he was doing a simple tackling action, he unexpectedly pulled the back and inside of his thigh muscles.  Because another foreign teammate was also injured, the Xinjiang team continuously suffered defeat.