Hanja Name
The King's name in Hanja is 李昪. In Korean, it is Yi Byeon. However, in most Chinese materials, his name is often misrecognized as 李昇, which is pronounced as Yi Seong. This is a very serious yet very popular error, as the character 昪 is a very rare word. 昇, however, is a very common one. Therefore, we need to take care when searching.
Read more about this topic: Cheoljong Of Joseon