After two years (tip to Instapundit), it is still amateur hour over there:
The Chinese delegation was clearly delighted: Chinese President and Communist Party chief Hu Jintao, stone-faced for many of his other photo ops in Washington, beamed with pleasure upon hearing the melody and embraced Lang Lang at the song’s conclusion (see it on YouTube too). President Obama, for his part, amiably praised Lang Lang for his performance and described the event as "an extraordinary evening."
Obviously, we don't speak Chinese.