Thanks for your help so far, now I only have one more ongoing problem that not solved yet.

6. I’ve set everything like you told https://www.screencast.com/t/nEnmTJAHBcyE but it’s still not change yet https://www.screencast.com/t/fZ0GCJrmp4I (the picture that appeared when sharing is still from a random article, the one that change in option look more like a favicon. and also the tagline that not appeared)

And one more thing about sharing. Why my article not like anyone else when it been shared. (like this https://www.screencast.com/t/NoV75AlX3z) it’s a headline in 1st row and more content in 2nd row right? But mine is headline both rows https://www.screencast.com/t/ltuq9bryJY

Thank you very much

Thanks a lot for your clarify, but there’re something I don’t understand it clearly so I’d like to ask you again a little bit more in each topics.

1. Is it really that hopeless? Aren’t there have such things like code or plugin that could solve it easier? Just make a first picture of each article into a featured image or something like that. It’d be much appreciate if you know a proper way to do it. Because I’m kind a fear to search for a code or plugin by myself without having someone who’s reliable recommend it to me.
(I have a huge amount of old articles added recently, it’s impossible to set all of these one by one. But if I’m not do something, these articles would show on my website with blank. And that would be horrible)

2. So the mobile theme menu will not show what inside mega menu right? Here’s the website menu – http://www.screencast.com/t/T2IByVUh1tx and the mobile menu – http://www.screencast.com/t/tF66hKFlcUP0 so my case here have to switch back to the non-mobile theme to show it properly, is that correct? And also the page that I’ve made – http://www.screencast.com/t/igogX9zLUC it will not show anything in mobile theme too?
– http://www.screencast.com/t/wWQejqNpycSL

3. So the 7 days sort order is forced to show post views on the article right? (At first I disable it because I thought it just on/off the number shown on article, but still counting in background)

4. Did you have any recommend plugin too?

5. This one is fine.

6. It is this – http://www.screencast.com/t/Te2VK1Hn the picture that would appear if someone share my homepage. And also the sub-head in no.2, where can I add them?

Many thanks.