Manchester United is the world's best club. There is no reason to move to any other team.
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.
It would be honour for me to keep playing for Manchester United.
North Korea and South Korea speak the same language, and actually, we are the same country.
Football can make things different, and football can make change around the world. I hope football can do something for Korea.
Many Asian players have seen they can play in Europe at a high level.
I am very happy that I proved Asian players can deal with the high levels of European football.
I have a lot of good memories, especially the days when I have lifted trophies. They are great feelings. That is why Manchester United players want to lift trophies again and again.
A lot of the South Korean players are very interested in the Premier League. They ask questions about what life there is like, so I try to give them answers.
In Korea, if a player makes a mistake, the other players don't like to point it out. Rather, they try to embrace it; they take the attitude, 'Let's do better next time.' But in the West, if you do something wrong, another player will make a point of saying something, and you will have to fix it immediately.
It was a very difficult decision to leave United.
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.
There's no truth at all that I would leave United - I want to stay here, and I have no reason to leave. I would like to stay here for life, of course - why not? It's the best club in the world.
It's unbelievable. I never thought I could play for United 200 times.
I love playing for United and have lots of good memories from my time here.
Some players aren't able to show their ability in Europe, but some players can - I think the most important quality in the successful players is that they are mentally strong.
The biggest thing for Asian players to remember is the football style is different in Europe - as is the culture - so they have to accept that. Mentally, they need to be ready and very strong.
Managers now don't just use 11 players; they have to care about all the squad of 25 or more players.
Mentally, you have to be strong, particularly in away games at the places where the fans are very passionate.
The best goal I have scored for the national team would be during the 2002 World Cup against Portugal. It was my first World Cup and my first goal in the World Cup. It was like a dream, and that's why it was so memorable.
