Abstract: Zizhong County Museum in Neijiang houses a large vertical central scroll of Chinese calligraphy of running script by ZHANG Daqian. On the scroll, there is a five-character poem titled Linghua Jingshui Qiu (Reflections of Autumn Flowers of Water Caltrop in the Mirror-like Waters). ZHANG incorporates the features of seal script and clerical script into running script in this calligraphy piece which, with a dynamic and vigorous style, projects an open and unrestrained aura. It is a masterpiece of ZHANG’s large-scale calligraphy preserved by museums in China. Investigation reveals that the poem is related to three paintings which are Ni Qingxiang Laoren Shanshui (In the Style of Master Qingxiang’s Landscape), Liuan Qingzhou (A Light Boat near the Willow Bank), and Xiyang Guixing (Sunset Return). The paintings provide deeper insights into Linghua Jingshui Qiu, and supplement research on ZHANG’s artistic life.