https://www.asahi.com/articles/DA3S13569192.html https://thepage.jp/detail/20170626-00000008-wordleaf?pattern=4&utm_expid=90592221-90.XuDNLc76QeGwwGjZsGOLmA.3

http://news.livedoor.com/article/detail/14961955/

http://nlab.itmedia.co.jp/nl/articles/1807/25/news081.html

http://sn.people.com.cn/BIG5/n2/2018/0725/c378286-31856844.html http://big5.ce.cn/gate/big5/m.ce.cn/sh/sgg/201807/25/t20180725_29851203.shtml