The G7 have this weekend supported China in their dispute with the White House which accused China of being a currency manipulator. The IMF have tacitly supported China also.
This unusual situation has been brought about by donald trump's weaponization of trade tariffs and has only served to isolate the USA in the commercial world.
China is no free to allow the market to dictate the slide of the Yuan and make Chinese imports into the USA competitive regardless of trump's attitude.
USA has only two options: 1) Negotiate a compromise with China, or 2) reduce it's own interest rates to devalue the USD thereby making Chinese import more expensive and making it's own export cheaper.
the dollar will continue the slide regardless.