Welcome to the forum!
Can you show an upclose on the center? Also can you describe the construction, if the designs in the silk are printed, painted or embroidered?
As far as preservation, it depends on what you want to do with it, just keeping it safe, or displaying it. To keep it, a nice dry, dark drawer or cupboard is great. Light is the enemy of textiles! Make sure it is not touching any wood or paper, they are acidic. roll it loosely, rather than folding it.
If you want to display it, a good UV filter shadowbox is good, but they cost a small fortune. (I have a Chinese cloud collar I'm putting in one when I can afford it!) If yours is flat, you might not need a shadowbox, just a frame larger than the piece, with UV filter Plexiglass. Make sure the backing is acid free, you can also put it on cotton cloth covered backing with cotton under it if it needs a "cushion". Make sure it's not touching the frame and make sure that the frame is not air-tight, it needs to be able to "breathe" so that moisture is not trapped in with the fabric. If the fabric is extremely dry, it can also be rehydrated, or cleaned, but if it is fragile, this kind of thing is best done by a pro.