Taiwan is a typical island and multi-island country surrounded by the sea; but people who lived on the main island doesn't know much of the lifestyles and features of outlying islanders. The inability to go abroad due to the impact of the epidemic also give everyone the opportunity to know Taiwan again from the perspective of outlying islands. Residents of outlying islands have developed their own culture and ethnicity due to the geography and ocean. Therefore we make postcard sets that bring about a feeling of the ocean park, allowing us to take it with us while travelling, not only to mail the postcard to ourselves, but also share them with our friends. By sending and receiving the postcards, travellers have chances to take a trip to the outlying islands and get to know Taiwan again!