Eight Principles of Yong

The character 永, yǒng, "forever", "permanence" Stroke order animated (left) and in color gradation from black to red (right)

The strokes numbered Where there are multiple numbers in an area, the strokes overlap briefly and continue from the previous number to the next.

The strokes together, and separated Sequence numbers and stroke directions in red

The Eight Principles of Yong (Chinese: 永字八法; pinyin: Yǒngzì Bā Fǎ; Japanese: 永字八法/えいじはっぽう, eiji happō; Korean: 영자팔법/永字八法, Yeongjapalbeop; Vietnamese: vĩnh tự bát pháp 永字八法) explain how to write eight common strokes in regular script which are found all in the one character, (pinyin: yǒng, "forever", "permanence"). It was traditionally believed that the frequent practice of these principles as a beginning calligrapher could ensure beauty in one's writing.

The Eight Principles are influenced by the earlier Seven Powers (七勢) by Lady Wei Shuo (衛鑠) of Eastern Jin. Publications on the Principles include:

Note: － Xié 斜 is sometimes added to the 永's strokes. It is a concave Shù falling right, always ended by a Gōu, visible on this image.

In addition to these eight common strokes in 永, there are at least two dozen strokes of combinations which enter in the composition of CJK strokes and by inclusion the CJK characters themselves.