1.实时的文本消息，支持表情图释，发送图片。 2.文件传送功能，支持大文件,多文件,目录的传输。 3.稳定的视频语音传输。-1. Real-time text messages, support expression explanation, sending pictures. 2. The file transfer function, and support large files, file, directory of transmission. 3. Stable vid

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