To put it bluntly, "the wool is on the dog and the pig pays the bill" is just resource integration. This article is not dry goods for many experts, and the curator just wants to throw a brick to attract jade and spread his mind. This is just a kind of thinking!

Wool comes from sheep, which is a law rooted in consumers' hearts. Many times, consumers don't believe that selling things doesn't make money, so they question the quality of products.

Looking for a pig to pay the bill "a buyer is a fool."