https://qooah.com/2013/02/04/line-%e5%87%ba%e4%be%86%e6%8a%bdwhatsapp%e6%b0%b4-%e7%94%a8%e6%88%b6%e6%80%a5%e5%8d%87%e5%85%a9%e5%80%8d/