THE present danger in Sino-United States trade relations is that, as far as the US is concerned, China's delivery of only the bare minimum on trade issues is no longer of any consequence.
US politics in a presidential election year demands there should be more.
This means that even if China lived up to everything demanded by previous Sino-US agreements, such as the intellectual property rights (IPR) agreement, it might not be enough.
It makes the job of the US negotiator on IPR and trade matters, Lee Sands, all the tougher.
If Mr Sands returns to Washington with nothing more than in the previous agreements, it may not be enough to ensure no action is taken against China.
Before Mr Sands set off for Beijing, the US warned that the posturing on both sides would increase, with charges and counter-charges lobbed across the Pacific.