Tantech says Yefang Zhang resigns as director and chairman effective Oct. 1
TANH•Tantech said Yefang Zhang resigned as director and chairman effective Oct. 1, and Yao L. Xu was elected director and chairman effective the same date.
1. Leadership changes
Tantech said in an SEC filing that Yefang Zhang resigned as director and chairman effective Oct. 1. Yao L. Xu was elected director and chairman effective Oct. 1.
