UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN ISSUER PURSUANT TO RULE 13a-16 OR 15d-1 6 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of April 2023 Commission file number: 001-38423 SUNLANDS TECHNOLOGY GROUP (Exact Name of Registrant as Specified in Its Charter) Building 4-6, Chaolai Science Park, No. 36 Chuangyuan Road, Chaoyang District Beijing, 100012, the People’s Republic of China +86-10-52413738 (Address of Principal Executive Offices) Indica ...