The happiest moment was when I just played with a ball as a boy, carefree, without worrying about anything.
When I made up my mind for Manchester, I felt I had betrayed Hiddink. I knew he wanted me to go to Chelsea, so I found it difficult.
Managers now don't just use 11 players; they have to care about all the squad of 25 or more players.
Manchester United is the world's best club. There is no reason to move to any other team.
The manager wants to show his tactics, and if I do them perfectly, he'll pick me.
I have to stop rushing things. I have to be composed in my mind and slow things down. I think that will make me a better finisher.
My reputation has increased, not just in Korea but across the continent.
I don't like to be famous.
Once I became more famous, I was proud that people in Asia started to look towards me.
If it is possible I want to finish my career at Manchester United.
As Europe is more advanced in football administration, I would like to learn more there.
My priority is what the manager wants me to do.
We always try to keep going and stay concentrated. Early goals help that a lot.
I just want to be good at soccer and have a normal life; it is a little ironic that you can't have both.
When we had a good relationship between North Korea and South Korea, we always connected with sports.
I try to help the team to win, and my role is to run a lot and bring energy to the side. It's my job, so I have to do it.
There aren't many Asian players in Europe or the Premier League, so that's more attention for me.
Asian culture is that people are quite excited about the players.
I just want to be a normal person.
I have enjoyed every minute of my time at United.
I'm looking forward to playing my part in keeping United at the top of the game.
It's not an easy game at Goodison Park - it's always difficult there.
I need to improve my finishing. I need more goals.
When I am in Korea, I can't walk down the streets. But I don't want to be famous or popular; I just want to be a good player.
Early goals make us more confident and energetic for the rest of the game.
Asian fans chase me and shout; it is different in England.
