b) I think he may be giving China a bit too much credit here ...
China's stimulus likely has been more effective than Trump's stimulus but not all that effective (absolutely)
(paragraph 15 of the staff report)
"[the] Personal Income Tax (PIT) reform decreased the progressivity of the tax system as a whole as it reduces the already small share of progressive tax revenues"
While cutting the central government spending to offset the budget impact of tax cuts
But based on the trade data, I am not so sure
But China's own economic cycle had turned, and it isn't clear that China has done enough to offset both its own cycle and the trade war
But judged simply on the trade data, China's economy is still weak.