China offers numerous 30-ton block ice machines, available in both direct cooling (faster, energy-efficient, aluminum evaporators) and brine refrigeration (traditional, larger capacity) systems, from manufacturers like CBFI, Focusun, Robin, and Coldmax, with options for large blocks (e.g., 50kg) for fishing/concrete, customizable sizes, and automatic operation for food-grade production, often featuring efficient compressors (like Hanbell) and durable, anti-corrosion designs.