1. Wufeng Wood Recycling Station: a company located near the northeast corner of Yangshankui Village, Longshan Sub-district Office, Jimo District, Qingdao City, Shandong Province, mainly engaged in wood acquisition, including Catalpa bungeana.
2. Qingdao Xiangzhongtai Renewable Resources Co., Ltd.: located 800 meters west of Gaojiazhuang Village Committee, Tongji Sub-district Office, Jimo District, Qingdao City, Shandong Province, mainly engaged in timber acquisition, including catalpa bungeana.