The children, all between the ages of 10 and 12, are training at Carrington every morning with the club's Soccer Schools coaches, learning to play 'the United way', before spending the afternoon learning English.
After training on Wednesday, the group were thrilled to meet and take part in a Q&A session with Ji, while Nani and Ryan Giggs came to sign autographs and pose for photos.
Park said afterwards: "I’m very proud. I just hope they’ve enjoyed the experience and remember it forever. They love playing football and it’s great for them to come to here, see the players and train with the coaching staff.
"I saw that they were all smiling, which makes me happy. Maybe one of them will play for United in the future! They just have to keep working hard and enjoying the game."
The young players are watching United’s game against Bolton on Saturday and playing friendlies against youth teams from Stockport County and Oldham Athletic next week.
But it's not all about the football, with English lessons at Trafford College, a stone's throw away from Old Trafford, also on the agenda.
Park said: "When I arrived here I couldn’t speak English very well, but they’re learning at an early age so they’ll pick up the language more quickly.