MOS BURGER Shuanglian Shop is a MOS Burger location in Shuanglian, Taipei, selling hamburgers and rice burgers. Customers can order the legal-style mushroom egg burger, grilled chicken burger, and king oyster mushroom rice burger, all made to order on site. Seating is available on the first floor and in the basement, and ordering ahead through the app has still meant waiting 5 to 10 minutes longer in some cases. Due to a shortage of staff, waits after ordering can run from 15 to 40 minutes.