This Korean drama is called "Wang Shizi on the Tower".

3 years ago, in the Korean era, Wang Shizi Li Ke (park yoo-chun) lost his beloved Shizi Ai, and summoned three courtiers, Song Wanbao (Li Minhao), Du Zhishan (Choi Woo-shik) and Yu Longxu (Zheng Xiyuan), to investigate the death of Shizi Ai. During the investigation, they were assassinated by assassins and inadvertently traveled through time and space to Seoul, South Korea in the 21st century.

They appear in the tower room where Park Ho (Han Ji Min) lives, and the kind Park Ho takes them in and gives them jobs. Later, Wang Shizi Li Ke also met Hong Shina (Zheng Roumei), who looks similar to the Prince's wife, and was mistaken for President Lu (Hyo-jeong Park), a long-lost grandson (park yoo-chun). He not only became the heir of the company, but also determined to pursue Hong Shina.

after two periods of intrigue, the truth gradually surfaced, and the images of North Korea's Prince Ai Huarong (played by Zheng Roumei) and his sister Furong (played by Han Ji Min) overlapped with those of Seoul's Hong Shina and Park Ho, and Wang Shizi finally found the answer.

Extended information:

After the publication of the design of Wang Shizi on the Tower, the audience immediately discussed it through various channels. Because from ancient times to modern times, the development of many things has exceeded the brain capacity of these four people. Once they crossed, they became omnipotent "crossing heroes". In "Wang Shizi, a Tower House", only the female high school students who were running all over the street, palaces that were converted into tourist attractions, and even eating instant noodles in convenience stores stared blankly.

Without Mary Su's plug-in and golden finger, they will only be silly and cute, and the more jokes they make, the more the audience will like to watch them. Behind the "stupidity", conspiracy, persistence, reincarnation, and love are cleverly stuffed into the whole plot, which is not abrupt and far-fetched, and even layered to make the audience "lead the king into the urn" but willing to be guided by the plot.