This article is transited from: http://www.cnblogs.com/kenshincui/p/4168532.html#3290791
The original article by cnblogs writer Kenshin Cui is very detailed. Many thanks for his selfless share. After following him, I found that we are fellow-villagers, both from Zhoukou city, Henan Province!!!
原文：http://www.cnblogs.com/yvette/p/4914013.html