Under normal circumstances, food used as an entrance cannot be returned. Do you think you can sell it again even if you return it? If something goes wrong, it will be a big deal. Either destroy it or refund it. If the other party asks that there is something wrong with your goods, you can explain the situation again. There is absolutely no need to return it. Once you agree, it means that your dried fish has quality problems. If it can't be solved, you can ask a third party, that is, the quality inspection department or the food supervision department to identify the quality of the goods. If it's your problem, you have to take responsibility. Otherwise, it is reasonable and fair for the other party to bear all the expenses required for testing. If the other person pesters you unreasonably, you don't have to pay attention to him.