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In page Bubble tea:

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In Korea, there are many different large and small milk tea shops, famous brands, or just small shops with a drink counter and a table. Although pearl milk tea originated in Taiwan, it underwent certain changes in Korea. When entering restaurants or bakeries in Korea, we will see the calorie index recorded very carefully as a way to protect the health of consumers. For example, at Gong Cha milk tea shops, customers can choose the sweetness of their milk tea by choosing the sugar level (0%, 30%, 50%, 70%, and 100%) and similarly choose ice to add their personal favorite flavor to their milk tea.[citation needed]