The ball is in China's court now. I wonder if they will be quiet and not rock the boat for a few months and allow America to dig itself deeper and deeper. Or immediately go on a blitz and try to fill in the vacuum left by America. I think at the very least, they should try to fill in the funding gap left by America in the WHO. Some other obvious steps.
1) Fill in gap left by America leaving the WHO
2) Take charge of the Paris agreement and take even more control of the global green revolution
3) Renegotiate trade deals with countries that are gonna be fucked by the tariffs, Europe, Mexico and Canada are prime targets, but every nation is going to have a real hard look at their trade policy if Trump really does tariff every nation like he claims.
4) Negotiate arms/defense/security deals with countries that are threatened by recent American aggression, namely Latin America and maybe Europe.
5) Try to get more influence/soft power globally.
Of course I have to ask, even if Trump hands over the role of world Hegemon and world's police to China on a sliver platter, do they even want that role? Or is China also better in mainly dealing with it's own backyard and just engaging with the world on trade?