A major problem with outsourcing to China is that you provide the product designs, assembly instructions, tooling requirements to them to build your product. They build it for a while and often hand off the whole production package to someone else to make for a lower price, since they aren’t paying you the royalties or profits, to the same customer list and distributors to whom they sold it previously on your behalf.
You get cheap production for a little while, and then you get a competitor who already has a business relationship with your customers.
When everything is made in China everything is copied by the Chinese.