Zhang Yucai was the thirty-eighth pope of the Zhengyi ("Orthodox Unity") Daoist church, lived at Mount Longhu (Dragon Tiger Mountain) in Jiangxi Province.
The picture represents dragons among clouds (Chinese dragons are associated with water). It records the success of his prayers in relieving a drought on the eastern coast.
Original size 26.8 x 271.8 cm
Metropolitan Museum of Art, New York. 1985.227.2