Shandong Minglong Construction Machinery Co., Ltd, an incorporated company restructured based on former Shandong Zhangqiu Crane Factory, is a professional tower crane manufacturer recognized by the Ministry of Construction. It was one of the first enterprises that achieved Production License issued by the Ministry of Construction in 1988 and one of the enterprises that achieved Special Industry Tower Crane Manufacture License issued by State Bureau of Technical Supervision in 2003. In April 2005 it achieved Special Equipment Manufacturing License of People's Republic of China and has been certificated ISO 9001:2000 standard. In 2010, Minglong set up a new trading company-Jinan Sanyisan International Trading Co., Ltd, dealing with kinds of construction machineries and building materials. For more than two decades, we have developed the advanced level QTZ40, QTZ50, QTZ63, QTZ80, QTZ100 QTZ125 and QTZ 160 self-telescoping, top slewing and trolleying on horizontal jib tower cranes with Changsha Institute of Construction Machinery of the Ministry of Construction.
Besides tower cranes, we also developed WL160 hoisting machine, SCD200/200 construction elevator, JS350, JS500 and JS750 compulsory twin shaft mixer and associated concrete and stabilized soil mixing station. Meanwhile, we also offer monitoring systems and devices of tower cranes and building hoists: anti-collision system, safety protection monitoring system, wind-speed transmitter, overload limiters, load moment limiter, height, radius and slewing limiters, GPRS remote controlling system, space limit monitoring system, anti-overturning monitor controller, wireless floor call system of building hoist, sensors of tower cranes and automatic leveling device system of building hoist.

In the past 30 years, we always adhere to ?Science and technology are the primary productivie forces", established ?Crane Research Institute?, developed education and training of staff, and introduced a group of talents from colleges