Guo Yuan Yi Taipei 101 Store is a pastry shop inside Taipei 101 in Xinyi District that sells mooncakes, mung bean cakes, pineapple cakes, and egg yolk pastries. It offers several kinds of gift box packaging and lets customers buy egg yolk pastries and pineapple cakes together. A voucher from a Taipei 101 observatory ticket can be exchanged for mung bean cakes, and staff tell customers to exchange the next day once the giveaway items run out. Staff hand over the voucher in a rough manner, which is a drawback.