Sunlands Technology Group is an online education provider serving adult learners in China through digital platforms that deliver live-streamed and prerecorded courses. The company generates revenue primarily from student tuition fees for self-taught higher education examination preparation, professional certification, vocational training, and personal development courses, which it delivers via its proprietary Genesis platform. Sunlands operates through a tuition-based model where students pay course fees either upfront or through installment plans, and the business depends significantly on active student acquisition and marketing efforts to maintain its enrollment base in the competitive adult online education market.