The fourth-generation upper knitting machine boasts outstanding performance and stable quality. It features a single machine head with the option of dual or triple systems, equipped with 16 yarn carriers, high-position rollers, cross-type sinkers, dynamic stitch density, motor reversal, and adjustable tight hanging stitches. Utilizing digital technology, it achieves high-speed and efficient knitting, enabling three-dimensional 3D weaving, full forming, semi-forming, sock and shoe production, cut pieces, and large fabric weaving. The C-type machine employs a unique yarn-pressing technique to achieve non-weaving filling and yarn pressing. It possesses functions such as hole picking, stitch hanging, inlaying, flat knitting, patterning, visible and invisible stitch picking, and other irregular pattern knitting features. Equipped with high-strength specialized needles for flyknit uppers, it offers a broad application range and a long lifespan. Suitable for various upper knitting yarns, it excels in the production of flyknit uppers.