金正恩、北京に来ていた。
“'North Korean train' in Beijing fuels Kim Jong-un visit rumours” http://www.bbc.com/news/world-asia-43547044
Ankit Panda “Kim in Beijing: Why Xi's still the one he needs to see” http://www.bbc.com/news/world-asia-43564834
新華社「習近平同金正恩挙行会談」http://news.ifeng.com/a/20180328/57115427_0.shtml
AbemaTIMES「WeChatも視察？習近平主席との会談の裏に、金正恩氏の苦悩も？」https://www.huffingtonpost.jp/abematimes/wechat-20180329_a_23398158/