https://blog.faceutil.com/2020/04/24/%ed%86%b5%ed%95%a9%eb%a9%94%ec%8b%a0%ec%a0%80-%ed%94%84%eb%a1%9c%ea%b7%b8%eb%9e%a8-pidgin%ed%94%bc%ec%a7%84-%eb%a9%94%ec%8b%a0%ec%a0%80%eb%a5%bc-%ed%86%b5%ed%95%a9%ed%95%b4%ec%84%9c-%ed%95%98/