Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 20-F ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 Commission file number 001-04192 (Exact name of Registrant as specified in its charter) Cayman Islands (Jurisdiction of incorporation or organization) Room 2103 Shanghai Mart Tower, 2299 Yan An Road West, Changning District, Shanghai China 200336 (Address of office) Michael J. Smith ...