I found the Chinese quotation mark error in close caption.

For example in the first image, actually, there is no space between Chinese character and quotation mark, but the close caption in the publish course shows in the wrong position when I preview in HTML5.

 I try to add space before the quotation mark as the image 2 attached, it shows a larger space than usual.

Does anyone know how to fix this problem?

ps. I used the font MircrosoftYahei.