QT creator官网下链接摸索了五六分钟才找到，哈哈，贡献出来：
https://www1.qt.io/download-open-source/?hsCtaTracking=62f25cf4-f8e8-407d-904a-8e565959edb9%7C468ec90e-9489-4f32-b850-eab062e7a8a7
2：选择Qt 5.6.3 for Windows 32-bit (MinGW 4.9.2, 1.0 GB) (info)版本
Qt 5.6.3 for Windows 32-bit (MinGW 4.9.2, 1.0 GB) (info)