Add notes for Chinese users

gh-actions-generate-toc.py

@@ -113,6 +113,9 @@ def human_readable_size(size):
     "Instrument files are hosted on GitHub and CloudFlare. If a same file is available on both platforms, "
     "the CloudFlare link is recommended. It's faster and you won't need to rename understrike "
     "(`_`) to space after downloading.\n\n"
+    "For Chinese users: CloudFlare only has CDN nodes in Mainland China for business users. If your download speed "
+    "is slow, you can manually change the domain name in the download link from `dl.muse-sounds.work` to "
+    "`dl-cn.muse-sounds.work`, which may uses better CDN nodes and routing. However, I don't guarantee it's faster.\n\n"
     "## About File Types\n\n"
     "- `*.sts.7z`: Compressed original sample files extracted from the sts file. Audio files are in opus format.\n"
     "- `*.sf2`: Converted SF2 format soundfont file.\n"