diff --git a/README.en.md b/README.en.md
index 6d0cfb9..1cd6fc0 100644
--- a/README.en.md
+++ b/README.en.md
@@ -7,21 +7,35 @@
 
 <div align=center><img src="doc/player.jpeg"></div>
 
-### Need a powerful opengl and vulkan yuv rendering module!
+### A powerful opengl and vulkan yuv rendering module is needed!
 
-1.  There are too many if else in the shader in Opengl, causing the GPU to run empty, affecting GPU decoding and av_hwframe_transfer_data speed, this phenomenon is especially obvious on 4K video images;
-2.  In WidgetRender, use QImage::Format_RGB32 and QImage::Format_ARGB32_Premultiplied image formats as much as possible. The following reasons:
+1.  There are too many if elses in the shader in Opengl, causing the GPU to run dry, affecting the speed of GPU decoding and av_hwframe_transfer_data. This phenomenon is particularly obvious on 4K video images;
+2.  In WidgetRender, use the QImage::Format_RGB32 and QImage::Format_ARGB32_Premultiplied image formats whenever possible. The following reasons:
     1.  Avoid most rendering directly to most of these formats using QPainter. Rendering is best optimized to the Format_RGB32  and Format_ARGB32_Premultiplied formats, and secondarily for rendering to the Format_RGB16, Format_RGBX8888,  Format_RGBA8888_Premultiplied, Format_RGBX64 and Format_RGBA64_Premultiplied formats.
 
-### Ffmpeg (5.0) is not the same as 4.4.3 in decoding subtitles
+### How does OpenGL render images in the BT.2020 color space?
 
-### Decoding subtitles (ffmpeg-n5.0):
+Now adjust the contrast, saturation, brightness; the effect is not very good.
+
+```cpp
+contrast = 1.6;
+saturation = 1.0;
+brightness = 0;
+```
+
+If you don't adjust it, it will have the same effect as the ffplay output image, and the overall color will be darker. For Netflix videos, the N at the beginning of the video is displayed in a darker yellow color.
+
+### How to achieve image quality enhancement when rendering images with OpenGL?
+
+### Ffmpeg (5.0) decodes subtitles differently from 4.4.3
+
+#### Decode subtitles (ffmpeg-n5.0):
 
     0,,en,,0000,0000,0000,,Peek-a-boo!
 
-you must use`ass_process_chunk`And set pts and duration as in libavfilter/vf_subtitles.c.
+you have to use`ass_process_chunk`and set pts and duration as in libavfilter/vf_subtitles.c.
 
-ASS standard format should be (ffmpeg-n4.4.3):
+#### The ASS standard format should be (ffmpeg-n4.4.3):
 
     Dialogue: 0,0:01:06.77,0:01:08.00,en,,0000,0000,0000,,Peek-a-boo!\r\n
 
@@ -35,8 +49,8 @@ use`ass_process_data`;
 
 How to set encoding parameters to get smaller files and better video quality?
 
-1.  set a very high bitrate;
-2.  set encoder`global_quality`invalid. code show as below:
+1.  Set a very high bitrate;
+2.  Set up the encoder`global_quality`invalid. code show as below:
 
     ```C++
     d_ptr->codecCtx->flags |= AV_CODEC_FLAG_QSCALE;
@@ -48,7 +62,7 @@ How to set encoding parameters to get smaller files and better video quality?
     av_opt_set_int(d_ptr->codecCtx, "crf", crf, AV_OPT_SEARCH_CHILDREN);
     ```
 
-### How to calculate pts from frames acquired by AVAudioFifo?
+### How to calculate pts from frames obtained by AVAudioFifo?
 
 ```C++
 // fix me?
@@ -57,9 +71,9 @@ frame->pts = transcodeCtx->audioPts / av_q2d(transcodeCtx->decContextInfoPtr->ti
 transcodeCtx->audioPts += frame->nb_samples;
 ```
 
-### [New BING's Video Transcoding Recommendations](./doc/bing_transcode.md)
+### [New BING’s video transcoding recommendations](./doc/bing_transcode.md)
 
-## SwsContext is great! Compared to QImage converted to and scaled.
+## SwsContext is great! Compare to QImage conversion to and scaling.
 
 ## QT-BUG
 
@@ -71,9 +85,9 @@ transcodeCtx->audioPts += frame->nb_samples;
 
 <https://stackoverflow.com/questions/74500509/failed-to-setup-resampler-when-starting-qaudiosink>
 
-#### Dynamically switch Video Render, switch from opengl to widget, there is still GPU 0-3D occupation, and the usage is twice that of opengl! ! ! QT-BUG?
+#### Dynamically switching Video Render, switching from opengl to widget, still consumes GPU 0-3D, and the usage is twice that of opengl! ! ! QT-BUG?
 
-### QOpenGLWidget memory leak, moving zoom in and out of the window, the code is as follows:
+### QOpenGLWidget memory leaks, moves the zoom in and out window, the code is as follows:
 
 ```C++
 int main(int argc, char *argv[])