Because the age of the tea and the method used for making and storing it all affect quality, there are many difficulties in judging the authenticity and quality of a cake of Pu'er.
搶購風潮下，爭端是非多，由於年代、作法、保存方法等都會影響老普洱的品質，因此增加許多真假、好壞鑑定上的困難。