Follow suit in vain
A Chinese idiom, w ǎ ngzhi í Su í x í ng in pinyin, means that the shape of the shadow depends on the shape. From Liezi Shuo Fu.
The origin of Idioms
Liezi Shuo Fu: "if the form is distorted, it will affect the music; if the form is straight, it will affect the right; however, if the form is distorted, it will follow the form but not the shadow.
Idiom usage
Used as an object or attribute; used in writing
Follow suit in vain
Be considerate of guests and good will - xī kè hǎo yì