Jiaxing Heyu Purification Technology Co., Ltd. (HTECH) is a high-tech enterprise specializing in the research and development, production and sales of air purification and sterilization modules and mobile air disinfection equipment. Sanyin Environmental Purification Technology Co., Ltd. was jointly established in December 2018. The company is located in Tongxiang, Zhejiang, the hometown of the famous Chinese cartoonist and writer Feng Zikai. It is located in the "Golden Triangle" of Jiangsu, Zhejiang and Shanghai, the hinterland of Hangzhou-Jiaxing-Huzhou Plain, 60 kilometers away from Hangzhou, 95 kilometers away from Suzhou, and 140 kilometers away from Shanghai.