BuilderHubEDITORIAL CARDSILICON STAR SELECTEDZarrar HassanFounder of plain. Building the intelligence layer for education.BUILDER PROFILEZarrar Hassan is the founder of plain, an AI education company building the intelligen...产品plain身份兼职创业 · Beijing, China全职投入—服务用户—产品迭代—