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:
Empress Liu (Li Congke's wife)
Table title:
Notes and references
Table:
<table id='hittask' contenteditable='False'>
<tr> <td colspan=1 rowspan=4 > Preceded by Empress Kong </td><td class="highlighted"  colspan=1 rowspan=1 > Empress of Later Tang 934-937 </td><td colspan=1 rowspan=1 > Succeeded by None (dynasty destroyed) </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > Empress of China (Central) 934-936 </td><td colspan=1 rowspan=1 > Succeeded by Empress Li of Later Jin </td></tr>
<tr> <td colspan=1 rowspan=1 > Empress of China (Beijing/Tianjin/Northern Hebei/Northern Shanxi) 934-937 </td><td colspan=1 rowspan=1 > Succeeded by Empress Xiao Sagezhi and Empress Zhen of Liao Dynasty </td></tr>
<tr> <td colspan=1 rowspan=1 > Wife to Sovereign of China (Zhejiang) 934-937 </td><td colspan=1 rowspan=1 > Succeeded by Lady Ma of Wuyue </td></tr>
</table>
Question:
What was Lui the emperor of during the 930’s?
Answer:
Empress Liu was an Empress of the China and Later Tang.