The Calstar brand originates from Calstar Associates Company, an American California-based company established in 1984 (Kellerda Limited Company in the United States). "Cal" is the abbreviation for California, and "star" means "star." The meaning of Calstar is "Star of California."

The Calstar Widebao Entrepreneurial Team (Environmental Equipment Project Development), established in 1995, specializes in the research, development, and sales of environmental equipment, as well as the distribution of solvent recovery equipment from international brands.

Established in mainland China in 2001, Shenzhen Kuanbao Environmental Protection Equipment specializes in the research and sales of solvent recovery machines. In 2003, Kuanbao Industrial Co., Ltd. was established in Taiwan, and the same year, the national patent and trademark for solvent recovery machines were obtained. In 2008, Kuanbao's solvent recovery machine brand, "Jingdebao," was successfully launched. Implementing a multi-brand business strategy, Shenzhen Kuanbao Environmental Protection Equipment engages in standardized and specialized mass production of solvent recovery equipment. In 2010, Kuanbao International Co., Ltd. was founded in Taiwan, with business operations spanning both domestic and international markets. In 2012, the company collaborated with CNOOC to establish a membrane treatment waste solvent system. The 7th generation fully automatic intelligent solvent recovery machine was launched in 2013, followed by the development of a fully automatic online gas solvent recovery machine in 2014.

Calstar Widebao brand offers environmentally friendly products including solvent recovery machines, oil-water separators, centrifugal oil purifiers, vacuum pressure reducers, and condensate recovery units.

Calstar Widebao has now grown to become the leading enterprise in China's solvent recovery machine industry.

Calstar Widebao brand has become an influential player in the Chinese solvent recycling machine industry.

The STAR brand originates from Calstar Associates Company, an American California-based company founded in 1984. "Cal" is the abbreviation for California, and "STAR" means "star," symbolizing "The Star of California." The Calstar team, known as "Kuanbao," was formed in 1995, with the name derived from the philosophy of "be generous to things and turn waste into treasure." In 2001, the Shenzhen Kuanbao Environmental Protection Equipment Co., Ltd. was established on the mainland, specializing in the research and sales of solvent recovery machines. In 2003, a branch was established in Taiwan...