I thought that might be the reason, too, so I went to check the number of employees. According to Wikipedia, Baidu has "34,600 (As of March 31, 2014)", and Goog

I thought that might be the reason, too, so I went to check the number of employees. According to Wikipedia, Baidu has "34,600 (As of March 31, 2014)", and Google "52,069 (Q2 2014)" So Baidu is 2/3 of Google - it's not just the size.