Qing Dynasty Huang Jingren's "Liangdangxuan Collection·Inscribed on the Painting of Plum Blossoms by Master Chiqiao Nunnery": "The brush tip is too late to be straightened, and the ink is as straight as the Hongmeng; the flower has two or three calyxes, and the power is inhuman through the back of the paper. "Gong."
Qing Zhao Yi's "Oubei Poetry Talk·Lu Fangweng's Poems": "The intention comes first with the pen, and the power penetrates the back of the paper."