Good onion rings turn sour.

Hello, I want to ask if the onion rings are sour or not. Onion rings are sour and can't be eaten. Shanghaojia onion rings turn sour because the food inside is spoiled due to air leakage in the package. Shanghaojia onion rings that turn sour can't be eaten and will have diarrhea. Shanghaojia onion rings are small snacks suitable for children's snacks and office leisure, with a package of one yuan.