A teacher tells children the story of King Sejong creating Korean alphabet Hangeul at the King Sejong Memorial Hall in Seoul, South Korea, on Oct. 9, 2013. South Korean people celebrated the Hangeul Day on Wednesday to mark the invention and proclamation of the Korean alphabet Hangeul by King Sejong of the Joseon Dynasty (1392-1910) in 1446. (Xinhua/Yao Qilin)

People visit King Sejong Memorial Hall in Seoul, South Korea, on Oct. 9, 2013. South Korean people celebrated the Hangeul Day on Wednesday to mark the invention and proclamation of the Korean alphabet Hangeul by King Sejong of the Joseon Dynasty (1392-1910) in 1446. (Xinhua/Yao Qilin)

People visit King Sejong Memorial Hall in Seoul, South Korea, on Oct. 9, 2013. South Korean people celebrated the Hangeul Day on Wednesday to mark the invention and proclamation of the Korean alphabet Hangeul by King Sejong of the Joseon Dynasty (1392-1910) in 1446. (Xinhua/Yao Qilin)

People visit King Sejong Memorial Hall in Seoul, South Korea, on Oct. 9, 2013. South Korean people celebrated the Hangeul Day on Wednesday to mark the invention and proclamation of the Korean alphabet Hangeul by King Sejong of the Joseon Dynasty (1392-1910) in 1446. (Xinhua/Yao Qilin)

A boy visits King Sejong Memorial Hall in Seoul, South Korea, on Oct. 9, 2013. South Korean people celebrated the Hangeul Day on Wednesday to mark the invention and proclamation of the Korean alphabet Hangeul by King Sejong of the Joseon Dynasty (1392-1910) in 1446. (Xinhua/Yao Qilin)