```json { "stock_code": "600050", "stock_name": "中国联通", "market_type": "A", "analysis_date": "2025-12-29T14:26:54.334228", "structure_snapshot": { "structure_type": "downtrend", "ma200_position": "near", "phase": "unclear", "key_levels": [ {"price": 5.11, "label": "当前价格/MA200重合位（关键支撑/压力）"}, {"price": 5.07, "label": "近期波段低点（短期支撑）"}, {"price": 5.14, "label": "近两日震荡高点（短期压力）"}, {"price": 5.22, "label": "MA20均线（中期压力）"}, {"price": 5.36, "label":