Why is there no sound when the Meitu Xiuxiu video is played backwards?

The original video sound is not turned on. Meitu Xiuxiu is an image processing software launched by Xiamen Meitu Technology Co., Ltd. in 2008. If the Meitu Xiuxiu video is played backwards and there is no sound, it means that the original sound of the video is not turned on. You need to click to select a video and turn up the volume. . Meitu Xiuxiu is aimed at mobile phone photography. It has picture special effects, portrait beauty and other functions. It can provide users with professional and intelligent photography and photo editing services. Its operation and procedures are relatively simple compared to professional picture processing software, allowing users to use it in a short time. Process photos. An original high-quality picture community launched by Meitu Xiuxiu, a gathering place for young people’s trendy life, and a recorder for sharing beautiful moments.