Keywords: Corn stalk; Hemicelluloses; Yellow liquor; Active oxygen cooking processX, (1→4)-β-d-xylopyranose; XU, (1→4)-β-d-xylopyranose-2-O-(4-O-methyl-α-d-glucuronic acid); U, 4-O-methyl-α-d-glucuronic acid; A, α-l-arabinofuranose; G, (1→4)-β-d-glucopyranose; L, l