Because there are no regulations concerning the pet products industry in China, all imported food and treats carry a significant degree of risk. You probably remember the contaminated pet foods from just a few years ago. Dogs and cats died then and they are probably still dying now because owners are not paying attention to these issues. Please read the labels on the edibles you purchase for your dogs, especially on the dog treats which are a hugely profitable business. Rawhides too, can be risky. Be sure they are MADE in the USA, not just packaged in the USA. Many of them come from South American countries, and there have been many warnings about those too.
Many people scoff at these warnings and disregard them. That's up to you. I only know that my friend's 10 year old mixed breed dog ate these treats, as well as the inexpensive rawhides that are always imported, and is in advanced kidney failure. Dogs that age should not die of kidney failure, and I will always wonder if the treats might not be involved. I won't be taking that chance with my dogs.