May 21, 2024

Dear Partners, Customers, and all Staff Members,

Hereby, we are delighted to announce that to better align with our strategic goals for growth and international expansion, our company name will be changing. This change reflects not only our evolving business direction but also our ambition to broaden our global presence. The new company name, LakeShore Biopharma Co., Ltd., reflects our core business focus and long-term vision. It also marks a significant milestone as our company enters a new phase of development and expansion.

1. Original and New Company Names

New Company Name: LakeShore Biopharma Co., Ltd.

New NASDAQ Stock Code: LSB

Original Company Name: YS Biopharma Co., Ltd.

2. Effective Date of the Name Change

The change of the company name has been officially taken effect on June 1st 2024.

3. Process Following the Name Change

From the effective date, please ensure all business transactions, contract activities, and payments reference the name LakeShore Biopharma Co., Ltd .

We will update our bank accounts, tax, and business registration details to reflect the new name. Specific updates regarding these changes will be communicated to you in due course. Our contact information, including the official website, email addresses, and telephone numbers, will be updated to align with the new company name.

We appreciate your support during this transition and look forward to a continued partnership under our new name.

Best regards,

LakeShore Biopharma Co., Ltd

Website: www.lakeshorebio.com

Email:cs@lakeshorebio.com

NASDAQ: LSB