There are no table borders in some places_html/css_WEB-ITnose

Today I made a calendar table of class schedules, but the page always has no borders, and some places are missing, which is very strange.
Code

<table  class="tbNormal clear" style="border-collapse: collapse;border-spacing: 0;border: 3px;width:98%; " border="1"><tr>							<td style="width:14%;background:#7092BE; vertical-align: middle;text-align: center;">

The page is put together
The displayed effect is:

Some places have no borders, and some places seem to have multiple borders. Please advise, thank you!

Reply to discussion (solution)

Add border to td’s style: 1px solid #000;

Set the border style, border: 3px solid #000 ;