How long do pearl balls and glutinous rice soak?

The practice is as follows:

1. Soak glutinous rice for more than 3 hours in advance (you can put it in the refrigerator overnight) and drain the water for later use.

2. Make meatballs with minced meat, roll a layer of glutinous rice and put it on a plate. You can decorate it with carrot powder or medlar.

3. Boil the water in a steamer, add the prepared meatballs, turn to medium heat after the fire, and steam for 30 minutes.