Settings aside the fact that the US currently enjoys very low unemployment, with a steady rate of job creation that is now the longest jobs expansion in recorded US history, why do you believe other countries are willing to manufacture things and give them away to Americans for free?
Dollars are only valuable as a medium of exchange for American goods and services. Chinese companies will export goods and services to America because there is a demand for US dollars to purchase American goods and services, which are generated by labor and sold for a profit.
The idea that wealth and jobs could flow out of the country as a result of trade - whether free trade, or otherwise - is literally impossible.