1. It's actually very simple to keep the boiled zongzi leaves from yellowing. We just need to put the zongzi leaves in boiling water and heat them until the clear water boils again, and then take them out and soak them in cold water for later use.

2. After we wrap the zongzi, we can't put the zongzi into the pot until the water used to cook the zongzi is boiled, so that the boiled zongzi leaves won't turn yellow.

3. We can also add a proper amount of salt to the water when cooking the leaves for the first time, which will make the leaves greener.