The concept of making "safe, environmental, reliable and advanced" products is implemented during designing and manufacturing processes. High working efficiency is achieved by adoption of double variable main hoist system contributing to low speed with heavy load, high speed with light load and energy saving, as well as high elevating and telescoping speed. Spacious and bright cabs for driver and operator, equipped with heater and air conditioner, comfortable for operation. Excellent lifting performance and wide working areas due to variety of counterweight combination, outrigger positions (fully extended and half extended), single top. Its main lifting performance ranks first in domestic similar products.