打包 https://blog.csdn.net/iw1210/article/details/51253458
各版本下载 http://download.qt.io/
打印相关：https://blog.csdn.net/fanyun_01/article/details/53431786
https://www.cnblogs.com/hisoka/p/5996154.html
https://blog.csdn.net/qqbitqqbit/article/details/17722507
https://www.cnblogs.com/findumars/p/6152822.html
串口： https://blog.csdn.net/imkelt/article/details/51058170