In 2021, Savol invented a breakthrough two-formula all-natural hair dye cream called "Tianfeng Herbal Oil- fused Hair Dye Cream (Natural Black)". This product is the result of 23 years of dedicated research by the Beijing Savol Natural Cosmetics Research Center. Savol's scientists extracted various natural plant chromophores, such as walnut, to darken the hair, while excluding harmful chemicals such as hydrogen peroxide and p-phenylenediamine. This product is a high-tech innovation that uses plants to darken and style hair without the use of chemicals. Currently, Savol is the only company in the world with the technology and capability to produce this product. In 2021, Savol obtained the Quality Mark certification for Zhejiang Manufacturing. They were also recognized by the Zhejiang Provincial Department of Economy and Information Technology as a specialized, refined, and new small and medium-sized enterprise. At the same time, Savol abtained certifications for their intellectual property management system and the integration of information technology and industrialization management system. Additionally, Savol was designated as a City-level Green Factory for the year 2021 by the People's Government of Taizhou City.