https://blog.gongquiz.com/2022/08/23/%ec%95%84%eb%82%98%ed%8c%94%eb%9d%bc%ed%8b%b1shock%ec%97%90-%eb%8c%80%ed%95%9c-%ec%84%a4%eb%aa%85%ec%9c%bc%eb%a1%9c-%ec%98%b3%ec%9d%80-%ea%b2%83%ec%9d%80-%ea%b0%84%ed%98%b8%ec%a1%b0%eb%ac%b4/