Sunlands to Report Second Quarter 2018 Financial Results on August 24, 2018

BEIJING,Aug. 13,2018 -- Sunlands Online Education Group (NYSE: STG) ("Sunlands" or the "Company"),a leader in China's online post-secondary and professional education,today announced that it will report its second quarter 2018 unaudited financial results on Friday,August 24,2018,before U.S. market hours.

Sunlands' management team will host a conference call at7:30amU.S. Eastern Time,(7:30pmBeijing/Hong Kongtime) onAugust 24,following the quarterly results announcement.

The dial-in details for the live conference call are:

International:

+1-412-902-4272

US toll free:

+1-888-346-8982

Canada toll free:

855-669-9657

Mainland China toll free:

4001-201203

Hong Kong toll free:

800-905945

Hong Kong:

+852-301-84992

Please dial in 10 minutes before the call is scheduled to begin. When prompted,ask to be connected to the Sunlands Online Education Group call. Participants will be required to state their name and company upon entering the call.

A live webcast and archive of the conference call will be available on the Investor Relations section of Sunlands' website at http://www.sunlands.com/investorroom.

A replay of the conference call will be available 1 hour after the end of the conference call until August 31,2018.

International:

+1-412-317-0088

US toll free:

+1-877-344-7529

Canada toll free:

855-669-9658

Replay access code:

10123257

About Sunlands

Sunlands Online Education Group (NYSE: STG) ("Sunlands" or the "Company") is the leader in China's online post-secondary and professional education in terms of gross billings in 2017,according to iResearch. With a one to many,live streaming platform,Sunlands offers various degree and diploma-oriented post-secondary courses as well as online professional courses and educational content,to help students prepare for professional certification exams and attain professional skills. Students can access its services either through PC or mobile applications. The Company's online platform cultivates a personalized,interactive learning environment by featuring a virtual learning community and a vast library of educational content offerings that adapt to the learning habits of its students. Sunlands offers a unique approach to education research and development that organizes subject content into Learning Outcome Trees,the Company's proprietary knowledge management system. Sunlands has a deep understanding of the educational needs of its prospective students and offers solutions that help them achieve their goals.

For investor enquiries,please contact:

Yingying Liu

IR Director

Tel: +86 182 5691 2232

Email:ir@sunlands.com

For media enquiries,please contact:

Brunswick Group

Anqi Yang

Tel: +86 10 5960 8639

Email: Sunlands@brunswickgroup.com

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