1. When choosing glutinous rice, you should feel it hard, full and smooth. Secondly, you should see that white is natural white, which is different from rice's white, milky and not as shiny as rice.

2. Don't use aluminum pots to soak rice, use stainless steel pots or porcelain pots, and the water should not exceed one inch of rice. Wash the rice with water before soaking, and the water will not exceed an inch of the rice. Don't pour out the washed water. This rice washing water can be used to water flowers, wash feet and get rid of athlete's foot.

3. Change the rice water the next day, but don't stir it, gently pour off the water on it and add new water; On the third day, the fermentation foamed, and the water on it was still gently poured out and replaced with new water.

4. You can make zongzi on the fourth day.