Shandong Zhongwen industrial group co., ltd (formerly Qingzhou construction machinery plant) is located in Miaozi town Qingzhou city. It occupies 150 mu, number of staff is 420, total asset is 170 million Yuan. Corporation takes "openness basing on sincerity" as the principle of company development, and company has been awarded as Weifang private technology advanced enterprise, Weifang best bank credit enterprise, Weifang private enterprises top 30, Shandong province construction machinery industry enterprises top ten, Shandong province tower crane enterprises top ten and Shandong province most potential private enterprise. And in 2009 corporation is awarded as "Shandong province large-size backbone enterprise" by Shandong province Commission on Economic Development and Jinan branch of The People's Bank of China.

Corporation leading products mainly are tower crane, mixing machine and dosing machine. QTZ series tower cranes are reputable at home and abroad, products are sold to Brazil, South Asia and Middle East. Of which, "inner-climbing type tower crane" is especially popular by customers of Brazil.