SHU-4

('shu' in the fourth tone)

There are 53 standard Chinese characters with a 'shu' pronunciation. There aren't many sound-indicating components for.the 'shu' pronunciation. One is: 术 (6 occurences)

竖 = vertical; the vertical stroke in Chinese writing

竖心旁 = shu(4) xin(1) pang(2) = the vertical heart radical = 忄