[RadioKid]

With Water:
Cold
1) Put tea bag and cold water into a pot (onr or two bags for 1 litter of water).
2) Shake the pot.
3) keep the pot in fridge for one or two hours and serve it with ice.

Hot:
You can also enjoy it heated by microwave (after kept in fridge).

(note: keeping too long time will spoil the taste.)

With Hot Water:
Put one tea bag and pour hot water (60 degree Celsus).
(After about one minutes,) serve it in small cups.
Adjust the taste by the temperture and time before serving.

[I added my opinion in italic]