Chinese equivalent of eggcorns?
白字 http://www.cantonese.sheik.co.uk/dictionary/words/14500/
wrong character of phonetic equivalent

Examples of 白字詞句 (words or phrases contain wrong character of phonetic equivalent):

'白撞'(to trespass under a false pretext) --&gt; 白狀 (狀 is a wrong character that sounds the same as 撞 in Cantonese; 白狀 literally means 'baseless account')

'脾氣' (temperament)--&gt; '皮氣' (皮 is a wrong character that sounds the same as  脾;'皮氣' literally means 'skin and Chi' implies 'outside and inside')

漫長競賽 (long long competition) --&gt; '萬場競賽' (countless competition) (萬場 and 漫長 sound similar in Cantonese)

'量少非君子, 無度不丈夫' --&gt;  '量少非君子, 無毒不丈夫' (道 was misheard as 毒)


The phrase '無度不丈夫' (true man cannot be without magnanimity) from the original idiom was misheard as  '無毒不丈夫' (true man cannot be without venom) and the wrong one got spread so far and wide, it became a common phrase on its own. Nowadays, when someone is about to do evil thing, this phrase would be used for an excuse