Sunlands Technology Group is a holding company. Through its subsidiaries, Co. is primarily engaged in providing online education service in the People's Republic of China. Co. provides post-secondary and other education through courses and educational content offerings. Co. provides Self-taught Higher Education Examination programs covering various majors, master's degree-oriented and other degree-or diploma-oriented post-secondary programs, and other certification and skills programs. Co. provides assistance and counseling to help students make informed decisions that suit their learning needs. Co.'s students can access its services either through PC or mobile applications.