Chinabyte, October 9 -- Just like the previous e-commerce sites and today's group-buying sites, only a few of the classified information websites, which initially numbered in the thousands, have managed to survive. While 58.com and Ganji.com and other first-tier enterprises appear to have secured their place at the top of the industry, the fact that Baidu and portal sites have begun to eye this area seems to be stirring things up once again.