A visitor receives type-b ultrasonic examination at the BioEco 2011 exhibition in Tianjin, north China, June 26, 2011. The 4th International Conference for Bioeconomy (BioEco 2011), China's top bioeconomy forum, opened in Tianjin at the Meijiang Conference and Exhibition Center on Sunday. A total of 222 Chinese and foreign companies have participated in the 3-day conference, showcasing over 1,000 biotechnological and biomedical products. [Xinhua/Yue Yuewei]