zhèng mǎ
original Chinese character coding based on component shapes, created by Zheng Yili 鄭易里|郑易里[Zheng4 Yi4 li3], underlying most stroke-based Chinese input methods
Zheng coding; also called common coding 字根通用碼|字根通用码[zi4 gen1 tong1 yong4 ma3]
郑
zhèng
abbr. for Zhengzhou 鄭州|郑州[Zheng4 zhou1], the capital of Henan
码
mǎ
(archaic) agate