Starting from the plastic steel door and window factory of a certain county in Sichuan, and later acting as an agent for a high-end brand, combined with independent research and development of products, solving industry pain points, deeply cultivating community group buying, gradually developing to cover the Yibin area, with annual sales of tens of millions of yuan.  
From research and development to production, from sales to installation, we have accumulated comprehensive and end-to-end industry experience, laying a solid product foundation for the takeoff of Jianjing.