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>
<div class="container-fluid">
<div class="table-responsive">
<table class="table table-striped table-bordered table-hover">
<thead>
<tr>
<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25</td>
<td>长安</td>
<td>陕西西安</td>
</tr>
<tr>
<th>东汉</th>
<td>25—220</td>
<td>洛阳</td>
<td>河南洛阳</td>
</tr>
<tr>
<th rowspan="3">三国</th>
<th>魏</th>
<td>220-265</td>
<td>洛阳</td>
<td>河南洛阳</td>
</tr>
<tr>
<th>蜀</th>
<td>221-263</td>
<td>成都</td>
<td>四川成都</td>
</tr>
<tr>
<th>吴</th>
<td>222-280</td>
<td>建业</td>
<td>江苏南京</td>
</tr>
<tr>
<th colspan="2">西晋</th>
<td>265-317</td>
<td>洛阳</td>
<td>河南洛阳</td>
</tr>
<tr>
<th rowspan="2">东晋
<br>十六国</th>
<th>东晋</th>
<td>317-420</td>
<td>建康</td>
<td>江苏南京</td>
</tr>
<tr>
<th>十六国</th>
<td>304-439</td>
<td>—</td>
<td>—</td>
</tr>
<tr>
<th rowspan="4">南朝</th>
<th>宋</th>
<td>420-479</td>
<td>建康</td>
<td>江苏南京</td>
</tr>
<tr>
<th>齐</th>
<td>479-502</td>
<td>建康</td>
<td>江苏南京</td>
</tr>
<tr>
<th>梁</th>
<td>502-557</td>
<td>建康</td>
<td>江苏南京</td>
</tr>
<tr>
<th>陈</th>
<td>557-589</td>
<td>建康</td>
<td>江苏南京</td>
</tr>
<tr>
<th rowspan="6">北朝</th>
<th rowspan="2">北魏</th>
<td rowspan="2">386-534</td>
<td>平城</td>
<td>山西大同</td>
</tr>
<tr>
<td>洛阳</td>
<td>河南洛阳</td>
</tr>
<tr>
<th>东魏</th>
<td>534-550</td>
<td>邺</td>
<td>河北临漳</td>
</tr>
<tr>
<th>北齐</th>
<td>550-577</td>
<td>邺</td>
<td>河北临漳</td>
</tr>
<tr>
<th>西魏</th>
<td>535-557</td>
<td>长安</td>
<td>陕西西安</td>
</tr>
<tr>
<th>北周</th>
<td>557-581</td>
<td>长安</td>
<td>陕西西安</td>
</tr>
<tr>
<th colspan="2">隋</th>
<td>581-618</td>
<td>大兴</td>
<td>陕西西安</td>
</tr>
<tr>
<th colspan="2">唐</th>
<td>618-907</td>
<td>长安</td>
<td>陕西西安</td>
</tr>
<tr>
<th rowspan="6">五代十国</th>
<th>后梁</th>
<td>907-923</td>
<td>汴</td>
<td>河南开封</td>
</tr>
<tr>
<th>后唐</th>
<td>923-936</td>
<td>洛阳</td>
<td>河南洛阳</td>
</tr>
<tr>
<th>后晋</th>
<td>936-946</td>
<td>汴</td>
<td>河南开封</td>
</tr>
<tr>
<th>后汉</th>
<td>947-950</td>
<td>汴</td>
<td>河南开封</td>
</tr>
<tr>
<th>后周</th>
<td>951-960</td>
<td>汴</td>
<td>河南开封</td>
</tr>
<tr>
<th>十国</th>
<td>902-979</td>
<td>—</td>
<td>—</td>
</tr>
<tr>
<th rowspan="2">宋</th>
<th>北宋</th>
<td>960-1127</td>
<td>开封</td>
<td>河南开封</td>
</tr>
<tr>
<th>南宋</th>
<td>1127-1279</td>
<td>临安</td>
<td>浙江杭州</td>
</tr>
<tr>
<th colspan="2">辽</th>
<td>907-1125</td>
<td>皇都(上京)</td>
<td>内蒙古 巴林左旗</td>
</tr>
<tr>
<th colspan="2">西夏</th>
<td>1038-1227</td>
<td>兴庆府</td>
<td>宁夏银川</td>
</tr>
<tr>
<th rowspan="3" colspan="2">金</th>
<td rowspan="3">1115-1234</td>
<td>会宁</td>
<td>阿城(黑龙江)</td>
</tr>
<tr>
<td>中都</td>
<td>北京</td>
</tr>
<tr>
<td>开封</td>
<td>河南开封</td>
</tr>
<tr>
<th colspan="2">元</th>
<td>1206-1368</td>
<td>大都</td>
<td>北京</td>
</tr>
<tr>
<th colspan="2">明</th>
<td>1368-1644</td>
<td>北京</td>
<td>北京</td>
</tr>
<tr>
<th colspan="2">清</th>
<td>1616-1911</td>
<td>北京</td>
<td>北京</td>
</tr>
<tr>
<th colspan="2">中华民国</th>
<td>1912-1949</td>
<td>南京</td>
<td>江苏南京</td>
</tr>
<tr>
<th colspan="5" class="text-center">*1949年10月1日成立，首都北京。</th>
</tr>
</table>
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成品图：