底线 dǐxiàn HSK7 bottom line Definitions Defs Origin Strokes Stroke Words Sentences Sents Showing: spy All meanings 8 dǐxiàn 8 bottom line 5baseline 1spy 1under thread 1 1 sentence for 底线 (dǐxiàn — spy) 诚信经营是一个商人必须守住的底线。 chéngxìn jīngyíng shì yī gè shāngrén bìxū shǒuzhu de dǐxiàn. Operating with integrity is a bottom line that every merchant must uphold. Source: Dong Chinese Dictionary