Wordpress帮助 - 无法查看包含代码的内容

I am trying to help a friend who's original developer bailed on this site. The theme is Webicompanyz and I see its using the Contact Form 7 plugin. In one of the pages is the following code snippet:

[include_contact]

This is including a form, but i cant tell where from. All the form includes from the Contact Form 7 plugin are different and I dont see this form listed anywhere. How can I tell where this code snippet is pulling from?

What you are seeing on this page is called a 'short code'. When WordPress reached one of these blocks it knows to fetch the missing content.

Short codes are widely used in plugins and widgets as an easy way to create dynamic content.

For your particular case

I would suggest viewing documentation for Contact Form 7