Classical Chinese poetry composition became a conventional skill of the well-educated throughout the Ming (1368–1644) and Qing (1644–1911) dynasties. Over a million poems have been preserved, including those by women, such as Dong Xiaowan and Liu Rushi, and by many other diverse voices. Painter-poets, such as Shen Zhou (1427–1509), Tang Yin (1470–1524), Wen Zhengming (1470–1559), and Yun Shouping (1633–1690), created worthy conspicuous poems as they combined art, poetry and calligraphy with brush on paper. Poetry composition competitions were socially common, as depicted in novels, for example over dessert after a nice dinner. The Song versus Tang debate continues through the centuries. While China's later imperial period does not seem to have broken new ground for innovative approaches to poetry, picking through its vast body of preserved works remains a scholarly challenge, so new treasures may yet be restored from obscurity.