Remove space between table border and heading

Question

HI,

I am using aspose.pdf to create a pdf in which using some HTML to create a  column in a row, But there is some space between the table border and column heading.

How can i remove it? 

 

Here is my HTML

 

<ol >

<li>Hong Kong Complaints Handling Policy</li>

<li>Hong Kong Professional Investor Policy</li>

<br>

</ol>

<h4 style=" border-bottom:1px solid black; border-top:1px solid black; top:25px; margin-bottom:10px;">Regulators</h4>

<ol>

<li>Hong Kong Licensing and Registration Policy </li>

</ol>