Error with http://soyaine.cn/JavaScript30/08 - Fun with HTML5 Canvas/index-SOYAINE.html

exception = HTTPConnectionPool(host='soyaine.cn', port=80): Max retries exceeded with url: /JavaScript30/08%20-%20Fun%20with%20HTML5%20Canvas/index-SOYAINE.html (Caused by NameResolutionError(": Failed to resolve 'soyaine.cn' ([Errno -2] Name or service not known)"))