{
  "description": "Explicit display references for sampling gaps. These ranges never claim exact annual boundaries.",
  "references": [
    {
      "start": -2070,
      "end": -1601,
      "dataset": "legacy",
      "year": -2000,
      "kind": "uncertain",
      "note": "夏的传统分期采用约前2070—前1600年；图形是二里头文化遗址分布的考古对应范围，非已证实国界。"
    },
    {
      "start": -1046,
      "end": -771,
      "dataset": "legacy",
      "year": -1000,
      "kind": "reference",
      "note": "以约前1000年的西周王畿（岐周—丰镐与成周）作时期参考；分封诸侯的疆界无可复原图，不能精确表示周初或每一年的控制范围。"
    },
    {
      "start": -770,
      "end": -751,
      "dataset": "legacy",
      "year": -500,
      "kind": "reference",
      "note": "春秋早期缺少已核验的分国图，暂以春秋诸侯合并范围作时期参考；资料年为前500年。"
    },
    {
      "start": -221,
      "end": -207,
      "dataset": "legacy",
      "year": -221,
      "kind": "period",
      "note": "秦代郡县时期示意包含统一后的拓展，不能作为每个浏览年份的即时疆界。"
    },
    {
      "start": 6,
      "end": 8,
      "dataset": "legacy",
      "year": -1,
      "kind": "reference",
      "note": "西汉末参考图；新朝从公元9年起单独展示，未采用源数据提前出现的新朝。"
    },
    {
      "start": 9,
      "end": 22,
      "dataset": "legacy",
      "year": 9,
      "kind": "period",
      "note": "新朝时期范围示意，原参考图标8—23年，浏览年表采用9年建国。"
    },
    {
      "start": 23,
      "end": 24,
      "dataset": "legacy",
      "year": 9,
      "kind": "reference",
      "note": "新汉之际沿用新朝时期地理范围作参考；不表示新朝仍存在，也未复原更始、赤眉等并存势力的边界。"
    },
    {
      "start": 25,
      "end": 29,
      "dataset": "legacy",
      "year": 100,
      "kind": "reference",
      "note": "东汉建国初期暂以100年东汉范围作时期参考，尚未逐年复原统一进程。"
    },
    {
      "start": 220,
      "end": 262,
      "dataset": "legacy",
      "year": 262,
      "kind": "reference",
      "note": "三国时期参考262年分国图，魏蜀吴的建国与早期征战仍按事件年份显示；参考图不代表三国初年的即时边界。"
    },
    {
      "start": 263,
      "end": 265,
      "dataset": "legacy",
      "year": 263,
      "kind": "reference",
      "note": "参考263年蜀汉归魏的归属变化示意，边界沿用262年概略重绘。"
    },
    {
      "start": 266,
      "end": 279,
      "dataset": "legacy",
      "year": 266,
      "kind": "reference",
      "note": "晋吴对峙时期参考图，266年更名反映魏晋更替；未复原其后的每次地方变化。"
    },
    {
      "start": 280,
      "end": 303,
      "dataset": "legacy",
      "year": 280,
      "kind": "period",
      "note": "西晋统一后至304年前的阶段图；不外推到十六国分裂时期。"
    },
    {
      "start": 304,
      "end": 305,
      "dataset": "cliopatria",
      "year": 306,
      "kind": "reference",
      "note": "源图从306年才单列汉赵、成汉；此处作为304年分裂初期的近邻参考，并非当年精确边界。"
    },
    {
      "start": 479,
      "end": 501,
      "dataset": "legacy",
      "year": 479,
      "kind": "period",
      "note": "南齐与北魏时期参考图，避免源数据延迟到480年才更名。"
    },
    {
      "start": 557,
      "end": 576,
      "dataset": "legacy",
      "year": 557,
      "kind": "period",
      "note": "北周、北齐、陈、西梁并存时期图，尚未复原每次局部战线变化。"
    },
    {
      "start": 577,
      "end": 580,
      "dataset": "legacy",
      "year": 577,
      "kind": "reference",
      "note": "参考577年北周灭北齐的归属变化示意。"
    },
    {
      "start": 589,
      "end": 591,
      "dataset": "cliopatria",
      "year": 592,
      "kind": "reference",
      "note": "隋灭陈后的统一阶段参考592年源图；不能将源数据延续到591年的陈当作继续存在。"
    },
    {
      "start": 618,
      "end": 622,
      "dataset": "cliopatria",
      "year": 623,
      "kind": "reference",
      "note": "隋末唐初参考623年格局，展示唐与割据势力；618—622年的具体战线尚未逐年复原。"
    },
    {
      "start": 1127,
      "end": 1138,
      "dataset": "legacy",
      "year": 1142,
      "kind": "reference",
      "note": "宋金战争时期参考1142年和议格局；不沿用源数据中仍覆盖北方的旧宋版图。战线并非逐年复原。"
    },
    {
      "start": 1234,
      "end": 1235,
      "dataset": "cliopatria",
      "year": 1236,
      "kind": "reference",
      "note": "金于1234年灭亡；此处参考1236年蒙宋格局，避免源图将金延续到1235年。战后边界仍为时期参考。",
      "source": "https://en.wikipedia.org/wiki/Jin_dynasty_(1115%E2%80%931234)"
    },
    {
      "start": 1279,
      "end": 1293,
      "dataset": "legacy",
      "year": 1279,
      "kind": "reference",
      "note": "元统一后的概略参考图，避免把整个蒙古帝国直接合称元朝。"
    },
    {
      "start": 1368,
      "end": 1374,
      "dataset": "cliopatria",
      "year": 1375,
      "kind": "reference",
      "note": "元明交替参考1375年的明与北元格局；尚未逐年复原1368年起的征服过程。"
    },
    {
      "start": 1644,
      "end": 1644,
      "dataset": "cliopatria",
      "year": 1645,
      "kind": "reference",
      "note": "明清之际参考1645年清与南明格局；1644年内的多次政权变化无法由一幅全年图表达。"
    },
    {
      "start": 1912,
      "end": 1912,
      "dataset": "cliopatria",
      "year": 1911,
      "kind": "reference",
      "note": "本图册止于清末，1912年退位节点保留1911年清末参考范围，不代表民国成立后的全年疆界。"
    }
  ],
  "labelCorrections": [
    {
      "original": "Wei",
      "start": -404,
      "end": -223,
      "name": "赵",
      "source": "https://en.wikipedia.org/wiki/Zhao_(state)",
      "wikipedia": "Zhao (state)",
      "wikidata": "Q197430",
      "note": "源图标为Wei的面在冀中和晋北，含代与灵寿；前291年并入原中山的面（面积相加，相差0.04），止于前223年，与赵灭中山（前296年）、代国残部存至前222年相符。同一数据集在前206—前204年把Wei画在平阳、Dai画在代与灵寿。该面是赵，与标为Zhao的面互换名称，几何不动。"
    },
    {
      "original": "Zhao",
      "start": -404,
      "end": -226,
      "name": "魏",
      "source": "https://en.wikipedia.org/wiki/Wei_(state)",
      "wikipedia": "Wei (state)",
      "wikidata": "Q912052",
      "note": "源图标为Zhao的面在晋南和豫北，含朝歌与汲，止于前226年，与魏前225年灭亡相符；前404—前367年的面还带着后来单独成为中山的一块，魏约在前406—前380年占有中山。该面是魏，与标为Wei的面互换名称，几何不动。"
    },
    {
      "original": "Western Jin",
      "start": 317,
      "end": 419,
      "name": "东晋",
      "source": "https://en.wikipedia.org/wiki/Jin_dynasty_(266%E2%80%93420)"
    },
    {
      "original": "Western Jin",
      "start": 420,
      "end": 425,
      "name": "刘宋",
      "source": "https://en.wikipedia.org/wiki/Liu_Song_dynasty",
      "wikipedia": "Liu Song dynasty",
      "wikidata": "Q49697"
    },
    {
      "original": "Southern Qi",
      "start": 502,
      "end": 509,
      "name": "梁",
      "source": "https://en.wikipedia.org/wiki/Liang_dynasty",
      "wikipedia": "Liang dynasty",
      "wikidata": "Q1069868"
    },
    {
      "original": "Eastern Wei",
      "start": 550,
      "end": 554,
      "name": "北齐",
      "source": "https://en.wikipedia.org/wiki/Northern_Qi",
      "wikipedia": "Northern Qi",
      "wikidata": "Q1143524"
    },
    {
      "original": "Northern Zhou",
      "start": 581,
      "end": 586,
      "name": "隋",
      "source": "https://en.wikipedia.org/wiki/Sui_dynasty",
      "wikipedia": "Sui dynasty",
      "wikidata": "Q7405"
    },
    {
      "original": "Sui Dynasty",
      "start": 618,
      "end": 627,
      "name": "隋末割据势力（源图）",
      "source": "https://en.wikipedia.org/wiki/Transition_from_Sui_to_Tang"
    },
    {
      "original": "Tang Dynasty",
      "start": 690,
      "end": 704,
      "name": "武周",
      "source": "https://en.wikipedia.org/wiki/Wu_Zhou",
      "wikipedia": "Wu Zhou",
      "wikidata": "Q835435"
    },
    {
      "original": "Southern Song",
      "start": 960,
      "end": 1126,
      "name": "北宋",
      "source": "https://en.wikipedia.org/wiki/Song_dynasty"
    },
    {
      "original": "Western Xia",
      "start": 990,
      "end": 1037,
      "name": "党项夏州势力",
      "source": "https://en.wikipedia.org/wiki/Western_Xia"
    },
    {
      "original": "Later Jin Dynasty",
      "start": 1636,
      "end": 1644,
      "name": "清",
      "source": "https://en.wikipedia.org/wiki/Qing_dynasty",
      "wikipedia": "Qing dynasty",
      "wikidata": "Q8733"
    },
    {
      "original": "Khoshut Khanate",
      "start": 1582,
      "end": 1635,
      "name": "和硕特部（源图）",
      "source": "https://en.wikipedia.org/wiki/Khoshut_Khanate"
    }
  ]
}
