Export version of a poster published in 1971 with the title 'Carry on and develop the revolutionary spirit of Lu Xun' (继承和发扬鲁迅的革命精神). 
The title of this version is from Lu Xun's poem Self-mockery (自嘲), written in 1932 and quoted by Mao in his Talks at the Yan'an Forum on Literature and Art, 1942.