Answer
You will find the link to your XING profile in the address bar of your browser when you are on your profile page. It usually has the following format:
https://www.xing.com/profile/Firstname_Lastname.
If several profiles exist with an identical name, the URL will have a number at the end, e.g. https://www.xing.com/profile/Firstname_Lastname123.
Click here to go to your profile and see your link.