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- 1963 ● Set up Changyi Agricultural Machinery Repairing Factory；
1981 ● Changed its name as Changyi Light Industrial Machinery Factory,
engaging in plastics machinery industry；
1986 ● Awarded the May Day Medal of the State；
1987 ● Changed its name as Weifang Light Industrial Machinery Factory；
1991 ● Completed the new office building；
● Set up Weifang Bohai Plastics Machinery Co., Ltd；
1993 ● Completed the Zhaoxian Building；
1994 ● Completed the first modern assembling workshop；
● Developed production equipment and technology for PVC tri-layer foamed pipe；
● Awarded Shandong Hi-tech Enterprise；
1995 ● Developed production line for UHMW-PE Pipe；
1996 ● Cooperated with Beijing Chemical Industry University；
● Developed production equipment and technology for One Step PEX Pipe；
● Developed production line for PE Gas and Water Pipe；
1997 ● Developed production line for Al-plastic Composite Pipe；
● Developed production line for PP-R Pipe；
1998 ● Certified with ISO9001 of the International Quality System；
1999 ● Reformed as Weifang Zhongyun Machinery Co., Ltd；
2000 ● Awarded the Famous Brand in Shandong Province；
●Awarded the Star Enterprise of Chinese Patent in Shandong Province；
2001 ● Developed production line for PE Double Corrugated Pipe；
● Awarded the Top Ten Excellent Enterprises of Hi-tech in Weifang；
● Awarded the Advanced Private Enterprise in Shandong Province；
2002 ● Set up Weifang Zhongyun Machinery Co., Ltd；
2003 ● Completed the modern assembling workshop of 15,000 sqm；
● Started the new project；
2004 ● Firstly developed production line in China for Model 1500 PE Double
Wall Corrugated Pipe；
● Developed production line for large diameter Steel-plastic Spiral Corrugated
Pipe；
2005 ● Set up Weifang Swisselectric Co., Ltd.；
● Set up Weifang Zhongyun Group.
● Zhongyun was listed in top 100 private enterprises
● SBG-800 type extrusion line for HDPE double wall corrugated pipe was listed in the
state key new products
● Extrusion line for double wall corrugated pipe gained Weifang Second Prize of
Technology Progress
2006 ● Leading products has got CE certificate of European Union
● Zhongyun was praised as Weifang outstanding technological private enterprises
● SBG-800 type extrusion line for HDPE double wall corrugated pipe was listed in
torch plan of our country
● “Yunou” brand was named Shandong Famous Brand constantly for three times
● Zhongyun was named Weifang Credit Private Enterprise
● Weifang Zhongyun Aluminium Cast Co., Ltd established
● SBG-800 type extrusion line for HDPE double wall corrugated pipe was praised as
Third Prize of Technology Progress in machinery industry
● Zhongyun was praised as Weifang Labor Insurance Credit Enterprise
2007 ●Zhongyun gained the honor of China's Patent Shandong Star Enterprise
● SBG-800 type extrusion line for HDPE double wall corrugated pipe was praised as
Shandong Small and Medium-sized Enterprise First Prize of Technology Progress
● Zhongyun was named key high-tech enterprise of State torch plan
●Company technology center was praised as Shandong plastic extruding machine
project research center by Science and Technology Bureau of Shandong Province
2008 ● Weifang Swisselectric Co., Ltd established
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