By supporting Russia, the US is actively threatening EU security and that makes a friendly US policy not a reasonable option right now.

Right now the US is threatening invasion of a part of Europe. The only reasonable option right now is going at it alone. Try to carve out our place in the world as Europeans. That entails forging a new China and US policy. China is a smaller threat that the US right now and by dealing with them, we could influence their policy towards Russia.

As China is increasing its influence mostly economically it would have more of an interest in EU security, to secure its economic activities.

I think the EU should not be opposed to good economic ties with China, but has to be careful with not getting economically too dependent on China and needs to reduce already existing dependencies.