In 2002, Mr. Wang Zefu, chairman of Lute Company, raised 100,000 yuan by himself and founded "Weifang Lute Air Conditioning Engineering Co., Ltd.", rented a 1,000 square meter factory building, and began to develop and produce air source heat pump units. and fuel (gas) central hot water unit.

In 2003, the energy-saving and environmentally friendly air-conditioning unit was successfully developed and passed the appraisal of the Weifang Science and Technology Bureau. The conclusion was that it was leading in the country and filled the gap in Shandong Province. In the same year, it was recognized as "Shandong Province High-tech" by the Shandong Provincial Science and Technology Bureau. Technology Enterprise”.

In 2004, the first phase of the company's production base with an area of ??2,000 square meters was completed and put into operation. At the same time, it began to develop and produce water source heat pump units. In the same year, it passed the ISO9001; 2000 quality management system certification and registered the distinctive "LUTE" The Greente trademark allows the company to more clearly highlight its efforts in the R&D and production of energy-saving, environmentally friendly and heating equipment.

In 2005, the company became a group member of the Shandong Refrigeration Society, was recognized as a Weifang private technology enterprise by the Weifang Municipal Science and Technology Bureau, and was rated as a contract-abiding and credit-abiding enterprise by the Weifang Municipal Bureau of Industry and Commerce.

In 2006, the company obtained the manufacturing license for Class I and II pressure vessels and changed its name to "Shandong Lute Air Conditioning System Co., Ltd.". At the same time, it was rated as "Weifang Consumer Satisfaction Unit".

In 2007, the company obtained the "Class 1 and Level 2 Qualification for Air Conditioning Maintenance and Installation" jointly approved by the China Refrigeration and Air-Conditioning Industry Association and the China Equipment Association. It was recognized as the supporting unit of "Weifang Ground Source Heat Pump Engineering Technology Research Center" by Weifang Science and Technology Bureau. At the same time, it was evaluated as an "Integrity Private Enterprise" by Weifang City.

In 2008, the company obtained the "refrigeration equipment production license", "CRAA product certification", "water-cooled chiller energy-saving product certification", and the second prize of the "Engineering Cup Grand Prix" issued by the China Refrigeration and Air-Conditioning Industry Association ”, has been recognized as “Shandong Province Higher Education Practice Base” by the Shandong Province Small and Medium Enterprises Higher Education Alliance, and listed as “Shandong Province Growing Small and Medium-sized Enterprises” by the Shandong Provincial Government. Some products have been exported to the United Kingdom and other places.

In 2009, the company obtained the "Level III Qualification for Mechanical and Electrical Equipment Installation Engineering" and developed "Ultra-high temperature water source heat pump unit", "Falling film water source heat pump unit", "Triple supply air source heat pump unit", "Sanlian water source heat pump unit".

On March 26, 2010, the company's air source expansion workshop officially started construction, marking the company's entry into a new stage of rapid development, and also marking the company's move towards promoting industrial structural adjustment, accelerating the transformation of development methods and urban transformation. Great steps have been taken.

In April 2010, our company's registered capital was successfully increased from RMB 8 million to RMB 12 million, marking the further growth of our company's strength.

On September 5, 2010, our company obtained the EU CE certification, which marked that our products were internationally recognized and our company officially entered the international market.

On September 12, 2010, three new types of units independently developed by our company, namely multi-function multi-effect water source heat pump unit, multi-function multi-effect water-cooled chiller unit, and special sewage source ultra-high temperature heat pump unit, passed the provincial appraisal. .

On October 20, 2010, Shandong Lute Air Conditioning System Co., Ltd. officially obtained the Special Equipment Design License (Pressure Vessel) of the People's Republic of China, Certificate Number: TS1237214-2014.

On December 10, 2010, our company’s independently developed Greente special sewage source ultra-high temperature heat pump unit and Greente multi-functional multi-effect water source heat pump unit were approved by Shandong Province Science and Technology Innovation Project.

In January 2011, our company was rated as a well-known brand product of Shandong private economy.

In January 2011, our company won the 2010 Productivity Promotion Award.

In January 2011, our company was awarded the first prize for independent innovation of small and medium-sized (private) enterprises in Shandong Province in 2010.

On March 31, 2011, our company was awarded the "Provincial Contract-abiding and Creditworthy Enterprise" of Shandong Province. Good credit is the foundation for the long-term development of an enterprise.

On April 21, 2011, the Lute Air Conditioning Water (Ground) Source Heat Pump Unit Technology Research Center of Shandong Lute Air Conditioning System Co., Ltd. was recognized for its continuous innovative research and development capabilities and superb professional technology. It is the first batch of "one enterprise, one technology" R&D center for small and medium-sized enterprises in the province in 2011.

In July 2011, the special sewage source ultra-high temperature heat pump unit developed by our company won the Weifang Energy Saving Award.

On August 13, 2011, Lute New Energy Engineering Co., Ltd., a subsidiary of Shandong Lute Group, was registered by the National Development and Reform Commission as the third batch of energy-saving service companies.

In September 2011, the special sewage source ultra-high temperature heat pump unit project developed by our company was awarded the third prize for Weifang City Employees’ Outstanding Technological Innovation Achievements.

In October 2011, our company won the Shandong Province Small and Medium Enterprise Science and Technology Progress Award.

On November 9, 2011, our company was included in the province’s first batch of strategic emerging enterprises and key new energy industry dispatching enterprises.

In November 2011, our company won the top ten leading brands of ground source heat pumps in 2011.

In January 2012, our company successfully increased its capital in stages, with the registered capital increasing from 12 million yuan to 16.2 million yuan.

In January 2012, the company passed the Shandong Province Renewable Energy Building Application Technology Product Certification.

In January 2012, our company won the Weicheng District Technology Innovation Award.

In January 2012, our company won the 2011 Advanced Unit for Small and Medium Enterprise Service System Construction.

In January 2012, our company was awarded the Weifang City Integrity Demonstration Unit.

In February 2012, it won the title of Advanced Enterprise in Weifang City’s 2011 “One Enterprise, One Technology” activity.

In April 2012, the seawater source heat pump unit independently developed by our company passed the provincial appraisal of the Shandong Science and Technology Department, filling a gap in the province.

In May 2012, Wolute Group won the "Second Batch of Shandong Province Technological Innovation Project Plan in 2012".

In May 2012, our company was listed in the "Weifang City's List of Municipal Enterprise Technology Centers Recognized in 2012".

In September 2012, the registered capital increase of Wolute Group was a complete success, increasing from 16.2 million yuan to 20 million yuan.

In November 2012, the "Safety Production License" applied by our company was successfully approved by the Shandong Provincial Construction Engineering Administration Bureau.

In December 2012, Greente Group’s heat pump energy-saving and cold chain system “New Technology Seminar, Expansion Project Completion Ribbon Cutting, 10th Anniversary Celebration and Annual Marketing Conference” were successfully held.