Exhibit 10.2 CERTIFICATE OF DESIGNATIONS, PREFERENCES AND RIGHTS OF SERIES A CONVERTIBLE PREFERRED SHARES OF CANAAN INC. Canaan Inc. (the "Company"), an exempted company incorporated and existing under the Companies Act (As Revised) of the Cayman Islands (the "Companies Act"), does hereby certify that, pursuant to authority conferred upon the Board of Directors of the Company (the "Board") by the Amended and Restated Memorandum and Articles of Association of the Company (the "Memorandum and Articles of Asso ...