Zuoyebang Patents

Patent portfolio assigned to Zuoyebang (verified via public assignee records). K12 ed-tech / homework app (Beijing). Main rival Yuanfudao confirmed via EqualOcean; other competitors from aggregator. Consumer app - no B2B customers page. Patents confirmed: Google Patents lists assignee 'Zuoyebang Education Technology Beijing Co Ltd' (CN113569112A, tutoring-strategy method).