source: www.quora.com
Currently, I'm using Quora which is a Q&A websites. I would say that Quora is the combination of baidu zhidao (百度知道) and Wikipedia. this is because it is a Q&A website where we can see a lof of questions and websites in Quara, just like baidu zhidao (百度知道) and Quora is a continually improving collection of questions and answers created, edited, and organized by everyone who uses it, just like Wikipedia, get everyone be the editor.