diff --git a/tools/AP_BWE_main/24kto48k/readme.txt b/tools/AP_BWE_main/24kto48k/readme.txt
new file mode 100644
index 0000000..de118a9
--- /dev/null
+++ b/tools/AP_BWE_main/24kto48k/readme.txt
@@ -0,0 +1,8 @@
+put g_24kto48k.zip and config.json in this folder
+把g_24kto48k.zip and config.json下到这个文件夹
+
+download link 下载链接:
+https://drive.google.com/drive/folders/1IIYTf2zbJWzelu4IftKD6ooHloJ8mnZF?usp=share_link
+
+audio sr project page 音频超分项目主页:
+https://github.com/yxlu-0102/AP-BWE