Quote from : Life and Death in Shanghai Book

But it also had many large posters with messages of a more peaceful nature. These extolled the country’s economic achievement since the Cultural Revolution, which was supposed to have liberated the forces of production and increased productivity. Of course, the Cultural Revolution had done just the opposite. Official lies like this, habitually indulged in and frequently displayed by the authorities, served no purpose except to create the impression that truth was unimportant. Pg. 400