The name "Pearl" is made of something called taro powder, which is not easy to buy. Generally, hotel supplies can be bought at Carrefour and Trust-Mart, and sometimes they can be bought. In fact, you can buy it in a small shop selling bubble tea outside. It's cheap, even a few dollars a pack. There is no distinction between good and bad. It seems that the reason why bubble tea is bad is that black tea will be mixed with milk, right?