This is Chinese Cooking Wine - not be confused with Shaoxing Cooking Wine which can be found here.
Chinese cooking wine is a basic ingredient for sauces and marinades. It is common to Chinese cooking but it is also excellent for other cuisines.
Chinese cooking wine is made from alcohol, water and salt. The alcohol burns off in the cooking. Except for the salt, it has almost no flavour on its own. This makes it a perfect mediator. It enhances other flavours.
Try mixing it with soy sauce and sugar for a braised Chinese beef or blend it into a paste of crushed dried herbs, salt, pepper and fresh garlic to marinate a leg of lamb.