1. When was the Company incorporated?

Sentage Holdings Inc. was incorporated in the Cayman Islands on September 16, 2019.

2. When did the Company become a public company?

July 9, 2021

3. When is the Company's fiscal year end?

December 31

4. Who is the Company’s independent auditor?

Friedman LLP

One Liberty Plaza, 165 Broadway, Floor 21, New York, NY 10006

Tel: 212-842-7000

Fax: 212-842-7001

5. Who is the Company’s legal counsel?

Hunter Taubman Fischer & Li LLC

800 Third Avenue, Suite 2800 New York, NY 10022

Tel: 212- 530-2206

Fax: 212- 202-6380

6.Who is the Company’s transfer agent?

Transhare Corporation

Bayside Center 1, 17755 US Highway 19 N, Suite 140, Clearwater FL 33764

Tel: 303-662-1112

Fax: 727-269-5616