Wood.
According to the query on the Baby Naming Dictionary website, the five elements of the character Yu: wood. The five elements belong to wood. The pinyin of the character Yu: yù. The radical of the character Yu: mountain. The structure of the character Yu: left and right structure; the character Yu has Several strokes: Simplified Chinese: 10 strokes, Traditional Chinese strokes: 10 strokes, Kangxi stroke: 10 strokes. The meaning of the word "媛" in the name: Original meaning: valley, the place where the valley or canyon begins.