The preface to "Feather Spectrum" in "Painting Spectrum of Ten Bamboo Grottoes" was written by Yang (whose real name was Longyou, a native of Guiyang, good at calligraphy and painting, and a magistrate of Jiangning at Chongzhen) in the seventh year of the Apocalypse (1627). Calligraphy and painting books have the order of waking up in the sixth year of Chongzhen (1633), which should be the latest order. It shows that Hu devoted himself to the research of printmaking overprint technology at the beginning of the apocalypse, and published the developed samples in batches. By the sixth year of Chongzhen (1633), a complete set of ten bamboo paintings had been completed. Hu is not only a painter and calligrapher, but also accomplished in carving and printing, which gives him unique conditions. In order to complete this painting, Hu studied the first-class seal engravers at that time and discussed with them day and night for ten years. Because of the complex process and high requirements, the division, carving, alignment, coloring and printing of plates cannot be sloppy. Therefore, before going to press, he must personally check and verify to ensure the quality. Therefore, the printed works have reached an unprecedented level. It can be called "thick accumulation and thin hair, and the article is full of energy; The density is dense and the picture is chaotic. " (Introduction to Yang Wengeng's Ten Bamboo Atlas) Hu is therefore an outstanding figure in the history of printing.
General score of ten bamboo houses painting