https://www.youtube.com/watch?v=Xm74Ut0E0FQ
http://news.dwnews.com/global/news/2018-01-11/60035002.html
DW
http://www.dw.com/zh/%E5%BE%B7%E8%AF%AD%E5%AA%92%E4%BD%93%E6%B7%B1%E5%B1%82%E9%87%91%E8%9E%8D%E5%8D%B1%E6%9C%BA-%E4%B8%AD%E5%9B%BD%E6%97%A0%E5%A4%84%E5%8F%AF%E8%BA%B2/a-42115102?&zhongwen=simp
