Learning to sing and dance was apparently only part of the job for trainees at JYP Entertainment. NMIXX members Jiwoo and Kyujin have offered a glimpse inside the K-pop powerhouse's extensive trainee education system, revealing that their Saturday lessons covered everything from dining etiquette and history to IT — on top of demanding monthly evaluations that could include as many as 11 categories. The two singers discussed their trainee years in a video uploaded Tuesday to chef Park Eun-young's YouTube channel "Bobeunyoung," where they chatted over packed lunches. Kyujin said trainees attended a range of classes every Saturday, including lessons on dining etiquette, history and IT. Park, surprised by the breadth of the curriculum, asked what exactly JYP trainees were taught about eating etiquette. Jiwoo and Kyujin said the lessons went into the differences among Korean, Japanese, Chinese and Western dining settings. "The utensils are different for Korean, Japanese, Chinese and Western food, so we learned the order in which they should be placed and how to use them," they said. They also