Winter Olympics ice hockey, don't understand just ask!
Winter Olympics men's ice hockey group stage began to play, do not understand ice hockey, and even pay little attention to the men's ice hockey national team, it is estimated that many people will not be like me a bit of a circle, not only a person does not know, and there are so many players like foreigners, the field also played what is the same, searched on the Internet, it turned out that most of them are naturalized players with Chinese ancestry!
So the question is, how long does it take for ice hockey to be naturalized to represent the national team?