https://www.project-syndicate.org/commentary/cambodian-prime-minister-hun-manet-poses-threat-to-democracy-regional-stability
http://1000shadow.blog127.fc2.com/blog-entry-9017.html
https://tw.news.yahoo.com/%E5%85%A5%E4%BD%8F%E5%95%86%E6%97%85%E6%B6%88%E5%A4%B1-%E7%BE%8E%E7%B1%8D%E5%85%92%E5%B0%91%E7%8C%
25,755KM-6KM=25,749KM