That manpower is also the cheapest as far as I know, not to mention the money trap that China puts other small countries in to create a new Silkroad. But, China beating US when it comes to economy is still a dream to be fair, the economy of China is exclusive and most of their wealth is invested in real estate bubble that does not pop because they have exclusive economy.
That is simply not true. Manpower in China used to be cheap, but that was one or two decades ago. The wages have risen to such a level that they are now 2-3 times higher than the comparable salaries in countries such as India and Indonesia. On top of that, they are now getting strict with environmental and other regulations. Lax regulations attracted a lot of investment earlier.
If you compare the salaries of US citizen with Chinese citizen then you can see huge difference in the minimum wages.Of course US doesn't have huge amount as minimum wage but still they are far like 10 or more times than average pay in those countries you mentioned. What China did is created more employment with very low pay so everyone can work which will help their government to become better in economy as well.
Last years chinese salaries grown very much. And they are already on 30-40% more than, for example, most of old comunists USSR countries, like Russia or Ukraine. Avarage in China is 14.294 $ (yearly)
https://tradingeconomics.com/china/wagesAnd we have a median salary in USA - 35.977 $ (yearly)
https://en.wikipedia.org/wiki/Personal_income_in_the_United_States#:~:text=The%20Bureau%20of%20Labor%20Statistics,sex%2C%20ethnicity%20and%20educational%20characteristics.
But in China we have also much less prices for living, buildng homes, services, etc. If we include that factor from GDP by PPP, we can see that on the same 1 dollar in USA you have a 1,72 dollars in China money buying power Index.
So we can see that is not big gap in final income and wealth -
14.294 $ * 1,72 = 24.585 $
24.585 $ vs 35.977 $ = US salary more on 46%
If we compare just pure numbers:
14.294 $ vs 35.977 $ = Us salary more just on 151%
And that`s why last 6-8 years most of companies oppening their new factories not in China but in Bangladesh, Vietnam and India. Because Chinese salaries already not little as it was 20 years ago, for example.
Average salary is higher in China but what about the salary of majority of people which is far lower than US as far as I know. Not sure about the exact values wnd calculation of average salary but the ground reality is different from what we can see on the paper.