Yes! When visiting Khan Academy's website https://www.khanacademy.org/ in China everything should function correctly (computer programming, math practice, coach tools, etc.). Because Youtube is blocked in China, we use a different video player to show the instructional videos.
If you're looking for localized Chinese content, you can go to https://zh-hans.khanacademy.org/ for a translated version of the site.
You may be able to access the "KA Lite" site from Iran instead of our full site https://learningequality.org/ka-lite/.