My post/page display the characters wierdly

This is because you have a lot of columns in the list and they don’t all fit in the space. Go to “Screen options” in the top right-hand corner and deselect the columns that you don’t need all the time. This will create more space and the list should look better again.

thanks for your reply, may I know where could I find this screen option button?

On the top right-hand corner. See: https://www.wpbeginner.com/glossary/screen-options/

thanks, I found it is caused by yoast SEO premium plugin, because it increase the SEO related navigation bar at the same bar of wordpress. not sure if I can find better solution if I have to install Yoast SEO premium. do you have more advice?

https://prnt.sc/cKBL8F4eo2im see the screencut here .