There are plenty of poorly qualified, undereducated Americans who can fill these low skill jobs.
There is nothing to fix. It is a job. It pays money. Not everyone has the ability to excel in a "career." They simply need a job.
And, no one can compete with China. All companies operating in China, regardless of ownership (state-owned, private, or foreign-owned), are subject to the same political influence. If the government tells a company to do something, the company does it. China also manipulates its currency as a means to drive its predominantly export-oriented economy.