Entertainers who strive for self-improvement are attracting attention. They showed the same academic passion as high school seniors for casting works or for overseas expansion. Fluent foreign language skills in the works can be seen as a result of the efforts of stars. Actor Kim Hee-ae has been studying English for 15 years since 2008. He wakes up every morning at 6 o'clock and is famous for his thorough self-management. In particular, Kim Hee-ae attended an academy in Gangnam Station. Currently, he is studying three books, writing, listening, and speaking. Even at the age of 50, he was amazed at his steadily whipping himself without releasing his study strap. Actor Lee Da-hae speaks Chinese at the level of a native speaker; Lee Da-hae, who is also active in China, has devoted himself to studying the Chinese language in order to advance into China; his efforts have paid off. He was the first Korean actor to appear in the China drama and acted in local language to collect topics. Lee Da-hae, who has been working on studying Chinese even after he has finished shooting. He also has China platform privileges that only two people can do in Korea. The approval process of the China Platform SNS must be Chinese. In this regard, Lee Da-hae appeared on MBC's "Point of Omniscient Interfere" last year and said, "It's similar to beauty content, but only me and Chu Ja-hyun are qualified." At that time, he was able to freely show his progress in Chinese. Some stars have begun studying to fully digest their roles in the work. Actors Byun Yo-han and Park Hae Soo have become more immersed in Japanese in the play. Byun Yo-han played the role of ⁇ Wakizaka ⁇ , the Supreme Commander of the Japanese Navy, in the movie ⁇ Hanshan: The Appearance of the Dragon. He explained, "Japanese Sensei resided at home. I learned Japanese while living with Sensei." Byun Yo-han, who boasted realistic Japanese and heavy charisma. The film Hanshan: Dragon' won six trophies, including the Best Supporting Actor Award at the 59th Baeksang Arts Grand Prix, the 8th Asia Star Awards Asia Star Award, and the 31st Boil Film Award. Park Hae Soo also performed all the lines in Japanese in the movie Phantom.' His co-star Seol Kyung-gu was also surprised by his efforts. Park Hae Soo said he practiced his best as if preparing for the Olympics with Sensei. "I was very scared to challenge (Japanese acting) to play the role of a Japanese person," he said at the film's Phantom ⁇ media preview. "The character was so attractive. I stayed with Sensei in Japanese day and night, "he said.