Donald Trump has repeatedly urged Xi Jinping to call him for discussions about a potential trade deal. But any off-ramp to the economic tensions will likely run through Vice Premier He Lifeng, who is Xi's Sino-American trade tsar.

China can expand domestic demand through various policies including rebates for swapping old vehicles, appliances and factory equipment for new ones, Zhao said, forecasting that demand for equipment upgrades will exceed 5 trillion yuan ($34.8 billion) a year.

Economic risks are growing as the two sides appear to disagree about whether they are even engaged in tariff negotiations.