https://baike.baidu.com/item/%E4%B8%AD%E5%9B%BD%E7%BB%8F%E6%B5%8E50%E4%BA%BA%E8%AE%BA%E5%9D%9B
http://www.chinatimes.com/newspapers/20140211000406-260102
http://finance.sina.com.cn/focus/50rlt2017nh/
http://money.people.com.cn/n1/2017/0107/c42877-29005880.html
