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前言

https://www.qt.io/blog/qt-6.6-released

https://download.qt.io/official_releases/qt/6.6/

https://download.qt.io/official_releases/online_installers/

国内镜像下载

在线安装器（维护工具）支持镜像作为启动参数

https://mirrors.tuna.tsinghua.edu.cn/qt/