For measuring gross economy size, I would go with nominal GDP.
Looking at the composition of the GDP China "accounted for 28 percent of global manufacturing output in 2018. That puts the country more than 10 percentage points ahead of the United States, which used to have the world's largest manufacturing sector until China overtook it in 2010."
Which is a serious bind on future growth.
There are also geopolitical issues that could radically change the equilibrium in the future.
For example
https://thediplomat.com/2020/12/would-china-invade-taiwan-fo...
I'm not sure those the US’S comparative advantage shifting to finance and IT over manufacturing is a “serious bind on future growth”.
It a limitation of ability to avoid interdependence, but that's a different issue.
TSMC is Chinese as well
They are in what we call Taiwan, but the status of Taiwan it's unclear and it's not officially a sovereign state, what would happen if the two China reunite under the same government?
China has also gained a big influence in Africa which is the fastest urbanizing region of the World and the second fastest region of the World for growth and it's on its way to become a 5 trillion economy
“Right now you could say that any big project in African cities that is higher than three floors or roads that are longer than three kilometers are most likely being built and engineered by the Chinese. It is ubiquitous” (source: Forbes)
They are playing the long game.