Chong Hui Xin discusses a document about schemas and social cognition. The document describes people lining up and ordering food at a stall, then waiting for their food to be prepared. It explains that these social behaviors become automatic through repeated learning and teaching from childhood. The brain forms schemas to understand social situations, like standing in line, without needing to consciously think about them. Schemas that are used often eventually become heuristics that guide automatic actions in social contexts. The document demonstrates how schemas help form social norms like orderly queues that maintain peaceful interactions in public.