Ingredients:
Tools：
Procedures:
Slice the grapefruit in half, and juice a half of it.
Slice the remaining half of grapefruit and put into the shaker.
Put in the lemon and lime as well.
Pound with muddler to release aroma and flavor.
Add in tea base and syrup, as well as the grapefruit juice.
Shake aggressively until bubbles appear.
Strain into a serving glass.
(Optional) Pin a slice of grapefruit on glass for aroma and serving purpose.