Qingdao Guanrui Carbon Fiber Technology Co., Ltd. was established in 1999, and Guanrui Technology was founded in 2015. It has the certification qualification of the National Infrared and Industrial Electric Heating Product Quality Supervision and Inspection Center. It specializes in providing a complete electric heating solution integrating R&D customization, production, logistics, and installation guidance for heating and health electric heating products and health heating therapy products. It has created the TTWARM graphene flexible heating film and is committed to creating TTWARM heating living spaces for customers.

For more than two decades, Guanrui Technology has been diligently researching in multiple electric heating fields such as product R&D, heating material selection, and product customization. It has integrated the entire electric heating industry chain and pioneered a leading business model for electric heating enterprises with seven major advantages.

To meet the rapid growth needs of the Chinese electric heating market, the company has formulated a brand upgrade and development strategy, strengthening the "TTWARM" brand. Guanrui Technology has established strategic alliances with many first-line heating brands at home and abroad. It has taken multiple measures from technological research and development to product design, production management, marketing planning, and product services, and has refined its own products and technologies. It has created high-quality and high-grade graphene floor heating and gradually promoted the "TTWARM" brand to the world.

As of 2019, the "TTWARM" brand products have over 20 national patents and have obtained multiple European product testing certifications such as CE, RoHS, LVD, EMC, and SGS. They have received high praise from customers in Europe, Japan, and South Korea. The company takes integrity as its foundation and has set an example for enterprises in the industry in all aspects, becoming an outstanding model for the development of the electric heating industry.

The products can provide complete graphene floor heating solutions for families, hotels, schools, villas, office buildings, hospitals, yoga studios, gyms, saunas, warehouses, vegetable greenhouses, etc., solving heating problems and customizing far-infrared electric heating beds, tatami, far-infrared mattresses, and heating TV background wall paintings.