Even if companies are convinced they need to manufacture stuff locally (ie they believe these tariffs are never going away, whereas in practice you'd expect tha

Even if companies are convinced they need to manufacture stuff locally (ie they believe these tariffs are never going away, whereas in practice you'd expect that, at absolute most, they're gone within four years, likely two, and maybe within weeks), you're talking about years to build up production capacity. China is likely taking the (reasonable) view that US consumers won't put up with years of higher prices.