It is in 1966 that the dazibao (Chinese traditional 大字報, Chinese simplified 大字报, Pinyin dàzìbào , literally “newspaper with great characters”) made their appearance in China. Entirely hand made, these small posters covered initially the walls of Beijing before gaining the provinces. This Média illegal and spontaneous conveyed not-official information and had the audacity to tackle the authorities of the country. Repression ends up putting an end to this free press in 1979.

By extension, the expression can be employed to indicate not-official publications. These publications can relate to the revelation of obvious injustices, or the production of information likely to clarify the opinion, or the attitude of power struggle of the members of a social group. The nature of this action, out of the traditional or official media, evokes an political arena, a social dynamics, until the revolution or the revolt. Certain actions of denouncement or handling can also use the " dazibao" according to the saying " calumniate, it will remain about it always something, even if it is faux"

This is why methods of " dazibao" pose, as in the press, the question of cross-checking of the information and the proof, like by analogy with the popular legal instruction. These actions can reveal a phenomenon of " soupape" within the framework of a pressure become unbearable by the weight of a social imbalance, an obvious injustice, a blocked situation or without exit by the conventional ways. They can proceed of the techniques of revolutionary fight or actors of strong change in the crisis situations.

Many forms of blogs on Internet become a modern form of the " Dazibao" , even its contemporary synonym.