It was only natural that the egomaniac-in-chief in the White House would see no need to get his allies on board with the campaign, not even diplomatically.
Beijing wants to avoid being drawn into a confrontation with Washington while still demonstrating that it has an independent voice on major international crises.
The erratic tariff policy pursued by the U.S. president and his administration has so far mainly served to strengthen ties between countries in the Global South and Beijing, and, where relevant, Moscow.