I'm actually curious as to how this plays out.
The US imports $5 worth of goods from China for every $1 dollar we export. Already, the Chinese have run out of US goods to levy tariffs on even before Trump's latest fart. If they then move on putting tariffs on services, where the US runs a small (~$50 billion) surplus, then it will represent a major escalation on China's part. And if they really do decide to go nuclear by selling off their T-bills, then they will cause their own currency to skyrocket and put their own companies out of business (or at least make them that much more expensive to subsidize by the central government).
The trade deficit in reality is
much lower than the figures being bandied about. Trump's 500 billion dollar figure is totally bogus. If one ignores the value added issues discussed in the link, that is the total trade deficit for the US, not just China.