Former Rockets player Yao Ming (R) greets Dwight Howard during the welcoming ceremony for Howard's joining Houston Rockets in Houston, the United States, July 13, 2013. (Xinhua/Song Qiong)

Former Rockets player Yao Ming reacts before the news conference and welcoming ceremony for Dwight Howard's joining Houston Rockets in Houston, the United States, July 13, 2013. (Xinhua/Song Qiong)