Same thing they have been doing for years-
Suppressing dissent.
Cheating in international trade by subsidizing government-owned industry, by debt trapping weak countries to gain a monopoly on their resources, by ignoring basic environmental, health and safety standards, by currency manipulation, and by outright theft of intellectual property.
Making increasingly aggressive moves for greater control of the South China Sea.
Love him or hate him, the clownish US president is the first one in my memory that has publicly called them out for it. And much of the rest of the world is starting to pay attention as a result.