Yantai Zhenghai Biotechnology Co., Ltd. engages in the research and development, production, and marketing of regenerative medical materials in China. It offers bone repair material, a partially deproteinised bone prepared from cancellous bones of calves after a series of treatment, such as decellularization and degreasing; oral cavity repair membrane line of products, which are used to treat defects of shallow oral cavity's soft tissue; and bio-membrane line of products that are used in neurosurgery to repair cerebral dura mater defect under the Heal-All brand name. The company also provides skin repair membrane line of products to repair wounds in dermal layer under the Heal-Full brand name. Yantai Zhenghai Biotechnology Co., Ltd. was founded in 2003 and is based in Yantai, China.