1, 3-4 hours.

2. The rice wrapped in zongzi does not need to be soaked for too long, otherwise the nutrition will be lost. Do not use hot water to soak, to prevent rice from being cooked during soaking. The leaves used for making zongzi also need to be cleaned with water, otherwise the impurities on the surface will affect the taste of zongzi. Zongzi should not be kept for too long after being cooked, and should be eaten as soon as possible.