On Amazon where you can now buy this 金属床架
Zinus Queen 14-Inch Metal Platform Bed Frame for only $67.25 shipped (regularly $114.99)!

With this minimalist style platform bed frame, you don’t need a box spring. It’s easy to assemble and includes a five-year warranty. Once assembled you’ll have a full 12 inches of under-bed space for storage. Note that this does not include the mattress.