Lián Dǒushān 連斗山, zì Shūdù 叔度, was a Qiánlóng-period Yìjīng scholar from Yǐngzhōu 潁州 (modern Ānhuī 安徽). His main work is the Zhōuyì biàn huà 周易辨畫 (KR1a0160) in forty juàn — the largest single Qiánlóng-period Yì commentary outside the imperial Sìkù-canonized works. Methodologically the work foregrounds biàn huà 辨畫 (discriminating the strokes): the meaning of each hexagram lies in its lines (yáng or yīn strokes); from these strokes the symbol is established and the words attached. The work makes extensive use of hùtǐ 互體 (component-trigrams) and reads each hexagram by detailed stroke-analysis. The Sìkù editors find the analysis sometimes “over-pierced” (too forced) but substantively in keeping with the cuò zōng biàn huà (paired-and-inverted-and-varying-stroke) original meaning of the Yì.