PDI stands for Produce Delivery Inspection, i.e., pre-delivery inspection. It is a pre-sale inspection certificate and a check that new products must pass before delivery. GOLBAL has formulated relatively strict PDI inspection standards for RT series cranes in accordance with the high-end North American market. The main inspection items include all inspectable items such as product appearance, performance, and ergonomics. Only products that pass GOLBAL's PDI inspection can leave the factory for sale, so as to ensure export quality. Since the main market for Zoomlion's RT series rough-terrain cranes is overseas, PDI inspection is essential to assure customers of the safety and original factory performance of new products. This is the company's largest PDI inspection to date in terms of both quantity and variety, covering four series: RT35, RT55, RT75, and RT100.

　　Due to the high PDI inspection standards, previous PDI inspections usually targeted a single unit or a small batch of 3 to 5 products. This simultaneous PDI inspection of a large batch of products indicates that the overall quality of RT series rough-terrain cranes has been greatly improved, providing strong support for further expanding overseas markets.