https://blog.wongcw.com/2022/08/13/%e6%b5%b7%e5%ba%b7%e5%a8%81%e8%a6%96%e4%b8%8a%e5%b8%82%e4%be%86%e4%b8%ad%e5%a0%b1%e6%b7%a8%e5%88%a9%e9%a6%96%e6%ac%a1%e4%b8%8b%e6%bb%91%ef%bc%8c%e4%b8%8a%e5%8d%8a%e5%b9%b4%e7%94%a2%e5%93%81%e6%af%9b/
海康威視上市來中報淨利首次下滑,上半年產品毛利率全線下降