Question

一犬吠影， 百犬吠声[yī quǎn fèi yǐng bǎi quǎn fèi shēng]1.■One dog barks at a shadow and the pack bark at the noise.; One barking dog sets all the street abarking.; servile echoes; When one dog barks at a shadow all the others join in -- slavishly to echo others.