Of course. In the middle period of fermentation (12 hours, 24 hours), the lid can be opened, but it should not be opened frequently. If there is no smell of wine and the rice has not formed tofu, you can take the lid of the container to the kitchen fire to heat it, and then cover it, so that the rice inside will not be unable to continue fermentation because of insufficient temperature. Fermentation time depends on the season. It takes about 20 hours to ferment yellow rice wine in summer and about 5 days in winter. We must pay attention to the time to ensure the taste.