How to pure a good green tea

I always talk to you all that green tea is very good for our health, but I never told you how to make the ideal a cup of green tea. This one I learned from green tea site, may be you have see it but it's better for me to share it with you all :

1. Use one tea bag, or it's about 2 - 4 grams of tea per cup.
2. Fill a kettle with cold water and bring to a boil.
3. After unplugging the kettle, allow it to stand for up to 3 minutes ( because the suit hot is about 80 celsius)
4. Pour the heated water over the tea bag or tea, and allow it to steep for up to 3 minutes. If using a tea bag, remove the bag.
5. Allow the tea to cool for two or three more minutes.