Yáng Dàoshēng 楊道聲, a Kāngxī-period associate of 陳夢雷 Chén Mènglèi (1650–1741). He contributed the thirty appended diagrams at the end of Chén’s Zhōuyì qiǎn shù (KR1a0134); the Sìkù editors describe these as “forced and trifling” (穿鑿煩碎) and not actually corresponding to the substance of Chén’s commentary, preserving them only because they were present in the original recension.