Years ago (30 years already?) if you shopped at Walmart you would see red, white and blue stickers proudly proclaiming "100% American Made" on items that were just that. If you buy a new car in the US the dealer sticker lists what percentage of the parts in the car are US-made versus imported. Labels that show what percentage of parts come from China could be a powerful marketing tool.
I doubt you could for the majority of products. Modern supply chains are global and China has a massive economy and thus a massive role in those supply chains.
