CKC Pinyin Search (縱橫拼音)

This tool designed by The Education University of Hong Kong (EdUHK) - CKC Centre for the Development of Information Technology in Chinese Language Teaching. Facilitate to search the CKC Code and learn of Chinese characters. For Example, if you search "為", all combinations for the CKC code (including code for variant Chinese character and instant code) will show: 000, 3, 34 and 3400.

CKC Chinese Input method is a type of appearance-based coding system. It encodes a Chinese character according to the stroke features of its 4 corners. The sequence is upper left corner, upper right corner, lower left corner and lower right corner (following the shape of the alphabet “Z”) respectively.

The strokes and the features of the Chinese character components are classified into 10 groups, represented by 0 through 9.

0 A left-falling stroke or a stroke with left-turning (丿亅).
1 A horizontal stroke or a horizontal rising stroke written from left to right (丨).
2 A vertical stroke or a left slanting stroke (一).
3 A dot or a right-falling stroke (丶 乀).
4 A cross or the radical of “Grass” (十乂卄).
5 The combination of a falling stroke runs through 2 horizontal strokes (≠ キ).
6 A square (口).
7 A corner, 2 upper corners, 2 lower corners or a stroke with right-turning (乚).
8 The shape of the numeral “Eight”(八) in Chinese or its variants (人丷).
9 The shape of the Chinese character which means “Small” (小), its variants and the radical of “Upright Heart”(忄).

What’s New

Version 1.1.0

- Added instruction page


Ka Ho Tse
16.6 MB

Requires iOS 10.3 or later. Compatible with iPhone, iPad and iPod touch.


English, Chinese, Simplified Chinese, Traditional Chinese

Age Rating


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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