Hi Jaimin,
Adhesive. It's got those stretchy Command-style strips along the right and left edges, the same kind used for iPhone batteries. Here's a picture of the hinges so you can see that they don't have the long reinforcing braces going up the sides of the lid like some other laptops do.
[image|2972590]
I located a YouTube video that has a lot of sections on disassembling various parts of your laptop; if you skip to 5:43 it shows the hinge cover removal, and at 6:06 you can watch the LCD removal procedure.
[link|https://www.youtube.com/watch?v=jemDK_VJOe8|HOW TO DISASSEMBLE/REMOVE PARTS OF Lenovo Yoga C630-13Q50 (81JL) - YouTube|new_window=true]
Hope that tells you what you needed to know. Be careful pulling the adhesive; if it breaks it could be very difficult to get the LCD off without damaging it.