Sincoray ZYHD670D‑4JZH is a high‑speed hybrid electric knife paper folding machine designed for professional post‑printing finishing. It integrates 4 parallel folds and 3 vertical folds, supporting 8-opening, 16-opening and 32-opening folding with optional punching and creasing functions. Driven by independent servo motors for each folding knife and controlled by PLC with HMI operation, the machine delivers high precision, stable running and low noise at a maximum speed of 230m/min. Equipped with German INA/FAG precision bearings, double‑sheet and jam protection, and a user‑friendly pull‑out design for easy maintenance, it is ideal for high‑efficiency folding of 40–210g/㎡ paper in commercial printing, bookbinding and brochure production.