Why is it called Yuzuru Hanyu grapefruit?

Because the English name of Yuzuru Hanyu is Yuzu Ruhanyu, the Japanese name is はにゅぅゆづる, and the Japanese homonym of Yuzu (?づづづづづ)' is grapefruit, so China's.

Besides, Yuzuru hanyu is also called "Haniu" by others for the same reason, because "hanyu" is pronounced as Haniu.

Other nicknames for Yuzuru Hanyu:

Jiu-Er, because the color of clothes in a competition in Yuzuru Hanyu is very similar to the scenery in Jiuzhaigou, fans called him Jiuzhaigou Fairy, also referred to as Jiu-Er, which gave him this stalk.

Jiro, an ancient nickname, is the second child in the family and has a four-year-old sister named Yu Sheng Sha Ling.

Little God Beast, the athlete who won the men's singles Olympic champion in that year was called "Ancient God Beast", while Yuzuru Hanyu won the Olympic champion again after nearly 70 years, so it was called "Little God Beast".