The production date of a bottle of sushi vinegar is 20 10 0420, and the validity period is two years. After it was opened last year, it was used twice and then sent there. Is it still available now?

Technically, don't use it You opened it last year and haven't used it for at least six months. It's not sealed, so you don't have to look at the expiration date. I suggest you throw it away. For the sake of health, don't be careless

You can also check for yourself whether it has gone bad. Look at the color and taste.

Personal advice, don't use it. Time is too long. There are hidden dangers to health.