I'm not so sure China is a threat to Europe. They're as far away from each other as they can possibly be. Sure, Europe is upset about China's human rights record, and their cheap manufacturing circumventing EU rules, and maybe also the economic influence China is trying to gain over other countries (Africa, central Asia), but it's not a threat to Europe itself, which Russia clearly is, and the US could become, if Trump decides to join Russia.

If the US turns, Europe may have to ally with China.