There's this scene where I speak Chinese. In that scene, I was told, 'Soocheol, just say anything in Chinese.' The writer said, 'Dongyeon will handle it well on his own.' We had discussions with the directors about whether to use fake Chinese or real Chinese. Eventually, Soocheol talks about cilantro after much deliberation. I had a headache, for real. There were several NGs. Everyone tried to hold back laughter, but Kim Jungnan Sunbaenim, who played as Beomja, couldn't hold it in and laughed during the scene. They just left it as it is.
Especially the line, 'Your Majesty~ What has become of my child?' was a phrase taught by Kim Jiwon. She mentioned that she had watched quite a few Chinese dramas herself, and since this phrase frequently appeared in historical dramas, she offered her help, which brought laughter.