Ai Yu "Big Four Joy" at Yih-Siang Cheng Wild Ai Yu Specialty Store sells Ai Yu made from Alishan Ai Yu seeds in Chiayi that undergo a hand-washing process, resulting in naturally soft and chewy texture. Additionally, the store hand-cooks black and red sugar water and selects fruit preserves from various fruits cultivated across Taiwan to offer consumers naturally safe and healthy beverages. The recommended "Ai Yu Big Four Joy" (Ai Yu "Da Si Xi") features fresh purple passion fruits from Taiwan, paired with hand-poured black sugar pearls, purple perilla leaves, and hand-washed Ai Yu—a combination of four distinct textures forming a harmonious experience symbolizing Big Four Joy, with its smooth mouthfeel, tartness, sweetness, and refreshing taste. For people who enjoy a combination of flavors, this is a healthy drink satisfying all chewing desires at once.