Here's a list of the current Trump tariffs taken from Wikpedia. It's important to remember that there's a 10% tariff on every country and special tariffs that severely affect Canada and Mexico. In Canada's case, it's the 25% tariff on steel, alumium, and autos.
This isn't just about China. Trump has focused much of his attack on Canada.
I don't think anybody understands what it is that Trump wants to negotiate.