Chagee Gangnam Flagship Store is a tea house near Gangnam Station on Line 2 that sells milk tea made with premium Chinese tea. Its signature drink is the BO-YA jasmine milk tea, which has a clear jasmine aroma and is not overly sweet, and it also offers a lapsang souchong milk tea and a peach oolong milk tea. Customers can order ahead on the mobile app, look around the area, and then pick up their drinks. In one case, a weekday 5 p.m. order took 20 minutes to make and 78 minutes for the mobile order, and wait times are long during typical hours.