Sunlands Technology Group (NYSE:STG) Q4 2021 Earnings Conference Call April 8, 2022 7:30 AM ET Company Participants Yuhua Ye - Investor Relations Representative Tongbo Liu - Chief Executive Officer Selena Lu Lv - Chief Financial Officer Conference Call Participants Operator Ladies and gentlemen, thank you for standing by. And welcome to Sunlands’ Fourth Quarter and Full Year 2021 Earnings Conference Call. Today’s conference call is being recorded. I would now like to turn the call over to your host today, Y ...