Xu Collection, Upper Volume Radical: Metal (jīn) Xiu Kangxi Strokes: 19 Page 1320, Entry 19 According to the Sound of Rhymes (Jiyun), pronounced xiu (falling tone), reading is the same as xiu. It refers to the corrosion that forms on the surface of iron objects. It can also be written in variant forms (xiu) or (xiu).