Coopers quality has been going down for a couple years. We quit carrying them at my shop last year due to quality control issues, and now if you look they are cheapening the tires... Hopefully the Goodyear acquisition rights the quality once again.
FWIW, Goodyear and Cooper both have factories in China but their production out of China is very limited.. Goodyear has a large market share selling to China, so bringing the Cooper brand to the same market makes sense..