I usually order half-sugar — full-sugar is too sweet.
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culture
Bubble tea (奶茶 nǎichá) shops let you pick a 糖度 on a fixed scale: 全糖 (full), 七分糖 (70%), 半糖 (50%), 三分糖 (30%), 微糖 (slight), 无糖 (none). Knowing this menu is essential for ordering at chains like 喜茶 (Xǐchá) or 蜜雪冰城 (Mìxuě Bīngchéng).