徐 Strokes Write it Listen 徐 xú slowly, quietly, calmly; dignified, composed HSK 7–9 10 strokes Radical 彳 Sound + meaning 1 word Built from彳meaningchìto step with the left foot余soundyúsurplus, remainder; surname How it works彳 hints at the meaning (step), and 余 yú hints at the sound.