Add 25-30 lychee, 4 tablespoon sugar and 8 tablespoon lime juice to the jar of a blender and blend to make a coarse paste.
Lychee puree is ready.
Transfer the lychee paste to a large pitcher. Add 5-6 mint leaves, 3-4 lime rounds and 4 cups of chilled water to the pitcher and stir until combined.
Pour the lemonade into serving glasses over ice. Garnish with mint leaves and lime rounds and serve chilled.