"Koreans invented Chinese characters"?

From the textbooks claiming "nurturing Yellow River civilization" to the application for heritage status of the "Dragon Boat Festival", changing Traditional Chinese Medicine to Korean Medicine for heritage application, and then claiming to be the origin country of "metal movable type printing", Koreans are becoming more and more outspoken. But even more astonishing is that some Koreans claim that "Chinese characters were invented by ancient Koreans!" This argument is now sparking a heated debate online, with Chinese people, Koreans, and many Western Chinese language researchers joining in. From refuting arguments to questioning significance, some are angry, some scoff at it, some find it funny, some find it pitiful, and some propose boycotting Korean goods and Korean dramas.

South Korea frequently challenges China in the field of history and culture. Is there something wrong with the Koreans? Or is there something wrong with us? Netizens say: "The purpose of this post is more about inspiring us to reflect on our own culture."