News headlines designers deviate language at various levels to attract and impress readers.Among va-rieties of deviate categories in China Dailyr,egister deviation is particularly striking.Based on Relevance Theo-ry,this paper expounds register deviation in China Daily news headlines by case study from two perspectives: for designers,register deviation is the ostensive stimulus where designers' intention lies;for readerst,heir un-derstanding of register deviation in China Daily news headlines is regarded as an ostensive-inferential process wh...