Because our northern neighbors did not fully master a complete set of barrel manufacturing techniques, their tank guns were in the same condition as ours, and the rolling, life and shooting accuracy were not as good as ours; we were another across the sea. The neighboring countries also made their 44-caliber 120mm tank guns weigh 3295kg because they did not fully master this technology. The full weight of China's 50-fold 125mm tank guns is only 3028kg.