Why can ceramic tableware break under sudden temperature changes?

Please verify the following points and require itemized written supplier responses:（ceramic tableware thermal shock） Ceramic is heat resistant but not immune to sudden thermal shock. Hot oil on cold dishes, direct heating of frozen items or cold rinsing of hot items may cause cracking. Allow items to return to room temperature and avoid open-flame dry heating or heating cracked items. Define capacity, accuracy, materials and operating environment before requesting quotes on a uniform basis. Request specification sheets, test reports, certificates, maintenance manuals and spare-part lists. During acceptance, verify appearance, dimensions, functions, safety protection and packaging, and keep test records. Do not compare unit price alone; include customization, freight, spare parts, after-sales support and downtime risk. Keep written records of inquiries, confirmations, FAT, acceptance and warranty commitments.