Exhibit 1.1 Adagene Inc. American Depositary Shares Each Representing 1.25 Ordinary Shares ($0.0001 par value per Ordinary Share) SALES AGREEMENT March 29, 2024 LEERINK PARTNERS LLC 1301 Avenue of the Americas, 12 Floor New York, New York 10019 Ladies and Gentlemen: Adagene Inc., an exempted company incorporated with limited liability under the laws of the Cayman Islands (the "Company"), confirms its agreement (this "Agreement") with Leerink Partners LLC (the "Agent"), as follows: 1. Issuance and Sale of AD ...