President George Bush, left, spoke during a Beijing news conference on February 21, 2002, touting gas bus engines made by Cummins, a U.S. engine company with a manufacturing division in Beijing, part of a strategy to clean the air for the 2008 Olympics in Beijing. Businessmen include, from left in background: Tim Stratford, GM vice chairman in China, Steven Chew, GM Allison Transmission director of China Operations, Zheng Shusen, president of Beijing Public Transportation Corporation and Xin Li, automotive director for Cummins. (Allison Transmission model B300R shown in foreground of photo) President Bush thanked Beijing Public Transport Corporation for using Cummins CNG engine with an Allison transmission and has encouraged Mr. Zheng Shusen, the president of Beijing Public Transportation Corporation, to buy more in the future.