引入CDN,算好需要合并的单元格。
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<title>朝代表title>
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<h1 class="text-center">历史朝代表h1>
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<th colspan="2">朝 代th>
<th>起 讫th>
<th>都 城th>
<th>今 地th>
tr>
thead>
<tr>
<th colspan="2">夏th>
<td>约前2146-1675年td>
<td>安邑td>
<td>山西夏县td>
tr>
<tr>
<th colspan="2">商th>
<td>约前1675-1029年td>
<td>亳td>
<td>河南商丘td>
tr>
<tr>
<th rowspan="2">周th>
<th>西周th>
<td>约前1029-771年td>
<td>镐京td>
<td>陕西西安td>
tr>
<tr>
<th>东周th>
<td>前770-256年td>
<td>洛邑td>
<td>河南洛阳td>
tr>
<tr>
<th colspan="2">秦th>
<td>前221-207年td>
<td>咸阳td>
<td>陕西咸阳td>
tr>
<tr>
<th rowspan="2">汉th>
<th>西汉th>
<td>前206—公元25td>
<td>长安td>
<td>陕西西安td>
tr>
<tr>
<th>东汉th>
<td>25—220td>
<td>洛阳td>
<td>河南洛阳td>
tr>
<tr>
<th rowspan="3">三国th>
<th>魏th>
<td>220-265td>
<td>洛阳td>
<td>河南洛阳td>
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<tr>
<th>蜀th>
<td>221-263td>
<td>成都td>
<td>四川成都td>
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<tr>
<th>吴th>
<td>222-280td>
<td>建业td>
<td>江苏南京td>
tr>
<tr>
<th colspan="2">西晋th>
<td>265-317td>
<td>洛阳td>
<td>河南洛阳td>
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<th rowspan="2">东晋
<br>十六国th>
<th>东晋th>
<td>317-420td>
<td>建康td>
<td>江苏南京td>
tr>
<tr>
<th>十六国th>
<td>304-439td>
<td>—td>
<td>—td>
tr>
<tr>
<th rowspan="4">南朝th>
<th>宋th>
<td>420-479td>
<td>建康td>
<td>江苏南京td>
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<tr>
<th>齐th>
<td>479-502td>
<td>建康td>
<td>江苏南京td>
tr>
<tr>
<th>梁th>
<td>502-557td>
<td>建康td>
<td>江苏南京td>
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<tr>
<th>陈th>
<td>557-589td>
<td>建康td>
<td>江苏南京td>
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<th rowspan="6">北朝th>
<th rowspan="2">北魏th>
<td rowspan="2">386-534td>
<td>平城td>
<td>山西大同td>
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<tr>
<td>洛阳td>
<td>河南洛阳td>
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<tr>
<th>东魏th>
<td>534-550td>
<td>邺td>
<td>河北临漳td>
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<tr>
<th>北齐th>
<td>550-577td>
<td>邺td>
<td>河北临漳td>
tr>
<tr>
<th>西魏th>
<td>535-557td>
<td>长安td>
<td>陕西西安td>
tr>
<tr>
<th>北周th>
<td>557-581td>
<td>长安td>
<td>陕西西安td>
tr>
<tr>
<th colspan="2">隋th>
<td>581-618td>
<td>大兴td>
<td>陕西西安td>
tr>
<tr>
<th colspan="2">唐th>
<td>618-907td>
<td>长安td>
<td>陕西西安td>
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<th rowspan="6">五代十国th>
<th>后梁th>
<td>907-923td>
<td>汴td>
<td>河南开封td>
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<th>后唐th>
<td>923-936td>
<td>洛阳td>
<td>河南洛阳td>
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<th>后晋th>
<td>936-946td>
<td>汴td>
<td>河南开封td>
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<th>后汉th>
<td>947-950td>
<td>汴td>
<td>河南开封td>
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<th>后周th>
<td>951-960td>
<td>汴td>
<td>河南开封td>
tr>
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<th>十国th>
<td>902-979td>
<td>—td>
<td>—td>
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<th rowspan="2">宋th>
<th>北宋th>
<td>960-1127td>
<td>开封td>
<td>河南开封td>
tr>
<tr>
<th>南宋th>
<td>1127-1279td>
<td>临安td>
<td>浙江杭州td>
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<tr>
<th colspan="2">辽th>
<td>907-1125td>
<td>皇都(上京)td>
<td>内蒙古 巴林左旗td>
tr>
<tr>
<th colspan="2">西夏th>
<td>1038-1227td>
<td>兴庆府td>
<td>宁夏银川td>
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<tr>
<th rowspan="3" colspan="2">金th>
<td rowspan="3">1115-1234td>
<td>会宁td>
<td>阿城(黑龙江)td>
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<td>中都td>
<td>北京td>
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<tr>
<td>开封td>
<td>河南开封td>
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<th colspan="2">元th>
<td>1206-1368td>
<td>大都td>
<td>北京td>
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<th colspan="2">明th>
<td>1368-1644td>
<td>北京td>
<td>北京td>
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<th colspan="2">清th>
<td>1616-1911td>
<td>北京td>
<td>北京td>
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<th colspan="2">中华民国th>
<td>1912-1949td>
<td>南京td>
<td>江苏南京td>
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<tr>
<th colspan="5" class="text-center">中华人民共和国1949年10月1日成立，首都北京。th>
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成品图：
