利用Qt开发tcp界面设计，包括客户端和服务器，并实现文件的上传下载，界面显示传输速度，能够高速传输文件。-Qt developers use tcp interface design, including client and server, and uploading and downloading files, the interface displays the transmission speed, high speed file transfer.

Tcp 高速服务器，可以高并发运行，提供异步的、事件驱动的程序(A Tcp high speed server that can run concurrently, providing asynchronous, event-driven programs)