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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 |