Why does Korea involve TV dramas and movies of the Ming Dynasty, and the costumes of the Ming Dynasty are different from those of North Korea?

Historical dramas of Japan and South Korea will be very rigorous in their own country's textual research, and the costume props are all in place, but those involving China are all shoddy, which may be suspected of uglification or disdainful of textual research. After all, in all the Korean historical dramas I have seen, the image of the Han people has never been positive. Fully prove the identity of the country. In the Ming Dynasty, Koreans were pawns of China people. Li Han continued the system of the Ming Dynasty, and the royal robes were given by China according to the official system of China. If it was privately owned, it was said to be trespassing and beheading. Official uniforms are treasures handed down from generation to generation, because there are not awards every year. I went to the Ming dynasty to buy, and the price was so high that I cried.