Tantech Holdings Ltd. engages in the development and manufacture of bamboo-based charcoal products. It operates through the following segments: Consumer Product, Trading, and Electric Vehicle. The Consumer Product segment includes purification and deodorization products, cleaning products, and barbecue charcoals designed for the domestic market that are sold under the brand name Charcoal Doctor. The Trading segment focuses on exporting charcoal products. The Electric Vehicle segment offers solar cells, lithium-ion batteries, auto parts, and electric control systems. The company was founded by Zheng Yu Wang on November 19, 2010 and is headquartered in Lishui, China.