Analysys International said in a statement today that China's search engine Ad market reached RMB 376 million (46 million US dollars excluding channel revenue) in the second quarter of 2006, among which RMB 322 million (40.25 million US dollars) was brought by search engine portals and RMB 54 million was brought by affiliate websites from search engine alliances. In the second quarter of 2006, Baidu led the market with market share of 50.3 percent in China while its market share of last quarter was 43.9 percent, and the revenue of RMB 189 million (24 million US dollars); followed by Google with revenue of RMB 61 million (7.6 million US dollars) and market share of 16.2 percent increased from 13.2 percent of last quarter; then comes Yahoo! China with revenue of RMB 59 million (7.3 million US dollars) and market share of 15.7 percent dropped from 21.3 percent of last quarter, and Sohu with revenue of RMB 28 million (3.5 million US dollars). According to Analysys International, as Baidu keeps on growing and Google increases its input, some second tier search engine providers will face more difficulties in operation, or even face the risk of withdrawal from the market.