Good brand can help a company to establish very good reputatiton ,that is the direct reason for most of companies are willing to spend a lot money to  make advertise on papers ,magzine ,tv and etc .

As  we know it not easy to  set up a well-know brand along the country ,it will need a lot of work to do included money ,publish relatioship , however ,to break one of the famous brand no need to much time  ,if there is some key problems published by goverment and soon  spreaded by interent across the county even in the whole world ,for instance , the famous brand of shuanghui of meat processing industry  had been affected by using brown meat essence ,as  i know this company's sales volume has dropped so much and most people both consumers and retailers will not trust this brand when they buy the meat in the supermarket ,and the company's share's value alreay depreciated in these days . and real case happed in last year a famous brand of dairy industry of san lu find excess melamine in the milk and sooner or later that company was take over by other comapny.that is means a famous brand collapse.

Does the brand of shuanghui will collapse ? who knows ,but the one thing for  sure they need to much time to  rehab this affairs . welcome to debate.