Exhibit 99.1

	May 27, 2022 Securities and Exchange Commission 100 F Street N.E. Washington, D.C. 20549 We have read Explanatory Note of Form 6-K of Tantech Holdings Ltd dated May 27, 2022. We agree with the statements made concerning our firm contained therein. Yours very truly, /s/ Prager Metis CPAs LLC Hackensack, New Jersey