dialects are part of ou life. we can't make smooth communication without them. dialects have their unique charms and they can't be replaced by other official languages. in dialects some slangs and expressions are playing the role of great importance. they can make communication more vivid and lively. they can activate dull atmospere . they can also shorten the invisible distance between strangers when they find they are surprisingly from the same are a branch of chinese culture with such a long history..