Some Cooper Tires are made in China such as Cooper Truck Tires which are China Made.
But Cooper Tires are also made in the USA for some of their tires.
All Cooper Truck Tires are made in China in the Hangzhou Rubber Co. Ltd
Cooper tires even those made in China are still very good quality tires.
Although China does make some inferior products I've used Cooper Tires and other tires from China on my vehicles and never had any issues with them.
You get a cheaper tire but they are still quality tires and I would not hesitate to buy tires made in China.