Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Bei'an–Heihe railway
Table title:
Route
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=2 rowspan=1 > Distance </th><th colspan=3 rowspan=1 > Station name </th><th colspan=2 rowspan=1 >  </th></tr>
<tr> <th colspan=1 rowspan=1 > Total; km </th><th colspan=1 rowspan=1 > S2S; km </th><th colspan=1 rowspan=1 > Current name </th><th colspan=1 rowspan=1 > Former name </th><th colspan=1 rowspan=1 > Year opened </th><th colspan=1 rowspan=1 > Connections </th></tr>
<tr> <td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td><td class="highlighted"  colspan=1 rowspan=1 > Bei'an 北安 </td><td colspan=1 rowspan=1 >  </td><td class="highlighted"  colspan=1 rowspan=1 > 1933 </td><td colspan=1 rowspan=1 > Binbei Railway, Qibei Railway </td></tr>
<tr> <td colspan=1 rowspan=1 > 16 </td><td colspan=1 rowspan=1 > 16 </td><td colspan=1 rowspan=1 > Erjing 二井 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1934 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 35 </td><td colspan=1 rowspan=1 > 19 </td><td colspan=1 rowspan=1 > Erlongshantun 二龙山屯 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1934 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 52 </td><td colspan=1 rowspan=1 > 17 </td><td colspan=1 rowspan=1 > Wudalianchi 五大连池 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1934 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 63 </td><td colspan=1 rowspan=1 > 11 </td><td colspan=1 rowspan=1 > Longzhen 龙镇 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1934 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 71.3 </td><td colspan=1 rowspan=1 > 7.8 </td><td colspan=1 rowspan=1 > Jusheng 聚盛 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1934 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 81 </td><td colspan=1 rowspan=1 > 18 </td><td colspan=1 rowspan=1 > Xianghe 襄河 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1934 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Longmenhe 龙门河 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1934 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 136.8 </td><td colspan=1 rowspan=1 >  </td><td class="highlighted"  colspan=1 rowspan=1 > Chenqing 辰清 </td><td colspan=1 rowspan=1 >  </td><td class="highlighted"  colspan=1 rowspan=1 > 1934 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Qingxi 清溪 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1935 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 187 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Sunwu 孙吴 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1935 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > North Sunwu 孙吴 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1935 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Eyu 额雨 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1935 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 234 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Chaoshui 潮水 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1935 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 257 </td><td colspan=1 rowspan=1 > 23 </td><td colspan=1 rowspan=1 > Xigangzi 西岗子 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1935 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Sanjitun 三吉屯 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1935 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 287 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Jinhe 锦河 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1935 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 302.9 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Heihe 黑河 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1935 </td><td colspan=1 rowspan=1 >  </td></tr>
</table>
Question:
What happened over the course of construction of the Bei'an–Heihe railway?
Answer:
Work on the new line, began at Bei'an, terminus in 1933, and the section, 136.8 km (85.0 mi) from Bei'an to Chenqing, was opened in 1934.