With the rapid development of Chinese economy,more and more foreigners have been attracted to China to invest,work,study and travel.To help the foreigners better understand China and facilitate cross-cultural communication,bilingual or even trilingual public signs spring up in every part of China.As is known that public signs,usually in the form of a few words,a picture or words accompanied with a picture,function not only as a“ face” of a city and a nation,but also as a first calling card given to the foreigners.Moreover,public signs have definite functions - informing,warning or directing.However,to our disappointment,mistranslations of the public signs are present everywhere.