Part of the article is not shown in the web page

In Carousel Pro I've added for testing a new image and a new article (see image below), using the preexisting one as example (i.e. La Combe Des Fous), so I divided the article in one part above the "Read More" red line (Part1 in the image), one before the big image (Part2), and one after the big image (Part3).

The result of the linked web page from Carousel image was the image below, where the first part was not shown (see the result here after), and the same result was also for the other preexisting article of the HotWine Demo (I've tried changing the format for some line of the "La Combe Des Fous" article and also there the part before the "read more" was not shown in the linked web page.

Q1 --> where is shown the first part of the article? (or what is for the first part of the article)

Q2 --> in the already existing demo article (i.e. La Combe Des Fous), are present 2 different images in the article (one little and one bigger), but only 1 is presented in the web page, which is that one? and ... what is the other for?

Thanks in advance

Roberto

first part is to be shown as intro-text on category page, other part is for article page.

separator is

<hr id="system-readmore" />

Thanks for your answer Ivan, you confirmed my assumption,

but what for the second question? (Q2 - why in the demo article are 2 images, one little and one bigger? what are they for?)

Thanks again

Roberto

So you use <hr id="system-readmore" /> to separate intro part from main content part that is it?

I use the button "Read More" in Article Management of Joomla Administrative, don't know what php command is issued, even i think is the one you told

Roberto

that read more is

this is <hr id="system-readmore" /> and it's template specific