https://www.zhsydz.com/download/product-manual-pdf-attachment/2023-11-03T14:35:03+08:00https://www.zhsydz.com/download/2024-shuangye-ebike-catalog/2023-11-03T14:48:23+08:00https://www.zhsydz.com/download/shuangye-2025-electric-bike-catalogue-released-at-the-137th-canton-fair/2025-10-22T17:13:55+08:00https://www.zhsydz.com/download/2026-electric-bike-catalogue/2026-04-15T21:40:14+08:00https://www.zhsydz.com/download/shuangye-139th-conton-fair-electric-bike-ecatalogue/2026-04-15T11:14:56+08:00