{
  "declared_links": {
    "economic_signal_ids": [],
    "relation": "topic-surface-only",
    "scan_signal_ids": []
  },
  "dek": "美国国土安全部9月15日起实施新的国际学生入境及停留规定，持F-1学生签证的国际学生将从现行的“身分有效期间”（duration of status）制度，改为获准在美国停留固定期限。新规定可能影响需要延长修业、转换课程、参加毕业后实习训练（OPT）或出境再入境的学生。",
  "desk": "politics",
  "event_id": "event-e218ec0c9811055692756537",
  "evidence_groups": [
    {
      "group_id": "france-medias-monde-rfi-editorial",
      "roles": [
        "media"
      ],
      "source_ids": [
        "rfi-chinese"
      ]
    }
  ],
  "evidence_refs": [
    {
      "independence_group": "france-medias-monde-rfi-editorial",
      "item_id": "item-f2b7d79cdec2269c84e423ef",
      "published_at": "2026-09-14T21:22:07Z",
      "role": "media",
      "source_id": "rfi-chinese",
      "source_name": "RFI",
      "title": "美国9月15日起国际学生签证规则有哪些变化？",
      "url": "https://www.rfi.fr/cn/%E4%B8%AD%E5%9B%BD/20260914-%E7%BE%8E%E5%9B%BD9%E6%9C%8815%E6%97%A5%E8%B5%B7%E5%9B%BD%E9%99%85%E5%AD%A6%E7%94%9F%E7%AD%BE%E8%AF%81%E8%A7%84%E5%88%99%E6%9C%89%E5%93%AA%E4%BA%9B%E5%8F%98%E5%8C%96",
      "version_id": "itemv-96fb44f5c31894004523c6ce"
    }
  ],
  "evidence_strength": "single-source",
  "headline": "美国9月15日起国际学生签证规则有哪些变化？",
  "lead": false,
  "lead_reason": "Current single-source metadata is retained but not promoted as a lead.",
  "limitations": [
    "Palimpsest retained only feed title, canonical link, time, and a bounded plain-text excerpt; it did not fetch the article body.",
    "The evidence-strength label describes source structure, not truth, intent, impact, or causation.",
    "Declared instrument links are topical pointers until a separate scan or economic observation is joined by time and method.",
    "Title-similarity clustering can miss differently worded or cross-language accounts and can join closely worded updates.",
    "This dossier currently contains one independent evidence group and remains explicitly attributed."
  ],
  "mutation": {
    "kind": "unchanged",
    "previous_version_id": "eventv-d272c59b6db4adec52d8c273"
  },
  "published_at": "2026-09-14T21:22:07Z",
  "reported_facts": [
    {
      "attribution": "RFI",
      "evidence_item_id": "item-f2b7d79cdec2269c84e423ef",
      "published_at": "2026-09-14T21:22:07Z",
      "statement": "RFI published “美国9月15日起国际学生签证规则有哪些变化？”."
    }
  ],
  "topics": [
    "economy",
    "policy",
    "politics",
    "rights"
  ],
  "updated_at": "2026-09-14T21:22:07Z",
  "url": "https://palimpsest.info/news/wire/event-e218ec0c9811055692756537/",
  "version_id": "eventv-d272c59b6db4adec52d8c273"
}