Use only facts in facts.json. Return JSON with: short_story (under 90 Chinese characters), verified_points (strings copied or conservatively paraphrased from source_facts), design_brief (one paragraph clearly labeled fictional), and needs_human_check (all requested historical or cultural claims not present in the facts). Do not invent dates beyond the source listing year, dynastic anecdotes, symbolic meanings, material recipes, named inheritors, museum objects, endorsements, prices, rights or market demand. Do not call the fictional bookmark an authentic 景泰蓝 object. Do not imply a museum, project holder or craftsperson approved it. Keep the cultural context respectful and do not caricature or distort the craft.
