Zi Collection, Page Position: Lower Radical: Son (ér) Chǎng Kangxi Dictionary strokes: 7 strokes Page 125, Entry 1 According to the Supplement to the Collection of Characters (Zihui Bu), this character is identical to the character cháng. It is a name for a type of jade, as recorded in the Biography of King Mu, Son of Heaven (Mu Tianzi Zhuan).