其實,中美都不是貿易大國（相對於GDP）

美國在154個國家中倒數第3. 中國倒數第15。 

https://www.theglobaleconomy.com/rankings/trade_openness/#:~:text=Trade%20openness%20%2D%20Country%20rankings&text=The%20average%20for%202023%20based,countries%20where%20data%20are%20available.