When testing in WCAG, the symbol of <b> will take some error, but why? How can we do if we want to bold the font?
The answer: use <strong> instead.
<strong> is the standard of XHTML,
<b> is supported of HTML,
What is differece between XHTML and HTML? please google it~ :)
So, next time, when we want to bold the font, we'd better use <strong> instead of using <b>