 BEIJING, May 25, 2021 PRNewswire -- Sunlands Technology Group NYSE: STG Sunlands or the Company, a leader in Chinas online post-secondary and professional education, today announced its unaudited financial results for the first quarter ended March 31, 2021. F irst Quarter 2021 Financial and Operational Snapshots Net revenues were RMB694.3 million US106.0 million, representing a 22.9 increase year-over-year. 