Tantech is a China-based company that manufactures and sells bamboo charcoal consumer products under the "Charcoal Doctor" brand. Its primary products include air purification and deodorization items such as charcoal bags, refrigerator deodorants, and automotive air purifiers designed to absorb odors and moisture. Tantech also produces liquid cleaning products and fertilizers derived from bamboo vinegar, a byproduct of the charcoal carbonization process. The company operates through two main activities: manufacturing branded products for the domestic Chinese market and trading raw bamboo charcoal purchased from third-party suppliers. Tantech distributes its products through a network covering cities across China, while a small portion of production is exported. Historically, Tantech has undergone frequent strategic shifts, recently divesting its electric vehicle and biodegradable packaging businesses to refocus on its core operations. Currently, the company is expanding into North America through a new construction materials wholesale and trading business based in California. Tantech’s business model relies on purchasing raw bamboo charcoal and vinegar from local suppliers, with profitability driven by production volume and brand recognition. The U.S. construction materials segment remains in its early stages.