Unless the Chinese have a cunning form of Economic MAD in mind, this is as stated earleir, a not so subtle hint of their power & will "never" be used. Along with a resurgent Russia flexing its muscles, this is only to be expected.The US has freely used economic blockades, sanctions and tariffs to shore up its own economy at the expense of others.For too long the US has done whatever it has needed to force its own agenda on everyone else - this may go some way to redressing the balance in global terms ( although it is still the average prole on the street who takes the shit one whoever is currently global top dog)
A moribund failed presidency, litle sight of of natural successor to the present incument, a fragile corporate debt market and you could be excused for assuming that the US is a gravely wounded animal at the minute( It isnt ).