C Ronaldo's jersey number is determined according to the club or national team he plays for, so he may wear different jersey numbers at different times and occasions. The following is a description of the jersey numbers used by Ronaldo at some important moments.

1. Manchester United period (2003-2009): # 7

When he joined Manchester United, Cristiano Ronaldo chose No.7 as his jersey number. This figure represents the tradition of some great players in United's history, such as eric cantona and David Beckham. During Ronaldo's stay at Manchester United, through his excellent performance and scoring ability, this figure is completely linked to himself.

2. Real Madrid period (2009-20 18): # 7

After Ronaldo moved to Real Madrid, he continued to use his No.7 at Manchester United. This number is of special significance to Ronaldo, representing his authority and dominance on the court. During his stay at Real Madrid, Cristiano Ronaldo further consolidated his contact with No.7 with amazing goals and the number of champions he won.

3. Juventus period (20 18 to present): #7

After Cristiano Ronaldo 20 18 moved to Juventus, he still chose No.7. This figure not only represents his personal brand and influence, but also symbolizes his outstanding career. At Juventus, Cristiano Ronaldo continued to show his strength and helped the team win many honors.

Cristiano Ronaldo used to wear different jersey numbers for the national team. In the Portuguese national team, he often wears the number 7, but sometimes he chooses other numbers, for example, he will wear the number 17 in international competitions. In addition to the major clubs and national teams mentioned above, Ronaldo has participated in other competitions and friendly matches, and his jersey number may change according to the competition or needs. Therefore, a fixed number cannot be given.

The jersey number is of special significance to a player, and sometimes it also represents the player's identity, honor and history. C Ronaldo's choice of No.7 is not only his personal choice, but also an affirmation of his achievements in football.