Guests pose for a group photo in front of a Boeing 737-900ER demonstrated in Beijing, capital of China, Oct. 24, 2011. A four-city demo tour featuring the Boeing 737-900ER, one of Boeing's newest commercial jet planes, was launched in Beijing on Monday. The next-generation airplane is believed to have inviting market prospects in China, according to Boeing's prediction. [Xinhua/Wang Jianhua]