Actor Yoo Ah In visited China to promote the JTBC drama "Secret Love Affair." Yoo Ah In, who played the genius pianist in the drama "Secret Love Affair," is rising as the new Hallyu star among the Chinese TV drama fans. Yoo Ah In at the JTBC drama "Secret Love Affair" promotion with Sohu shared his thoughts on filming dramas and movies. He said, "I performed a twenty year old as a twenty nine year old. I was able to do a better job of playing a twenty year old because I was more mature." He said on the drama, "It had the perfect happy ending. I think the new format of happy ending in the drama was that two people were growing, and walking together.