Today, I learn about Go-Guryo's golden age. I learned Gwangetto and King Jang-su. Before I learned that, I learned about Go-Guryo's foundation myth. Haeimo-su and Yu-hwa are married. One day Hae-mo-su left her. So the king Geum-wa took care Yu-hwa. One day, gave birth to an egg. It is very big and strange so he put the egg to the animals. However they took care the egg and thee is a baby named 'Ju-mong'. Ju-mong mean the person who is good at archer. But Geum-wa's seven sons are very jealous him so he is ran away to Bu-yoe and go to Joel-bon. Finally he establish Go-Guryo.Then after few century, there is Gwangetto. He expanded a lot of territory deep into Majuo. Then his son King Jang-su made the Go-Guryo's Golden Age. I go to Go-Guryo Dae-Jang-gan and learned these things. I was interesting day I think.