Photo = Yonhap News

On the eve before the centennial Hangeul Day, a mother and twin sisters on Oct. 8 check out a stone tablet engraved with the preface to the Hunminjeongeum (The Proper Sounds for the Instruction of the People), the original name for Hangeul, in front of the statue of King Sejong the Great at Gwanghwamun Square in Seoul's Jongno-gu District.