Tianjin shuangan labor insurance rubber co., ltd (formerly Lianhua rubber factory) was founded in 1954. Since 25, Shuang 'an Company has developed a series of "Shuang 'an brand" insulation protection equipment products with intellectual property rights, which are mainly used for direct live working in the maintenance and repair of AC 5V to 36.5kV lines, as human protection. In 26, the project of insulation series products for strong and high voltage live working was recognized by Tianjin High-tech Achievements Transformation Project. In 27, the series project of protection products for live working was awarded the second prize of outstanding technical innovation project by Tianjin. In 28, the project of insulating gloves for latex live working was recognized by Tianjin High-tech Achievements Transformation Project. In 29, the series of protection products for live working won the second prize of industrialization of scientific and technological achievements from 26 to 28 by Tianjin Bohai Chemical Group Company. In 21, the series of protection products for live working won the third prize of scientific and technological progress of China Petroleum and Chemical Industry Federation. In 211, Shuang 'an Company was recognized as a small and medium-sized science and technology enterprise in Tianjin.

Shuang' an Technology (Tianjin) Co., Ltd. is a scientific and technological specialized company engaged in insulation protection equipment and supplies in the early days of China. "Safety brand" products began in 1956. It has 6 years of professional production and sales capacity, and its products cover five major industries in China, including electric power, telecommunications, high-speed rail, mining and petrochemical. Some products have been exported to the international market and are trusted by consumers at home and abroad. From 1956 to 1958, China's first pair of electrical insulating shoes, the first rubber helmet, the first high-voltage insulating tape and the first pair of 6KV mining boots in China were born under the name of "Safety Brand". From 1984 to 26, some high-tech "family members" were added to the "Safety Brand" successively, such as the first set of non-combustible self-adhesive, the first pair of 2KV insulating rubber gloves and the first pair of 3KV and 4KV insulating boots for live working.

Although both companies are called Shuang 'an, their brands and trademarks are different, so there is no difference between true and false.