On Amazon.com you can now buy this 家用可组装的锻炼用泡沫垫子
Ottomanson EVA Foam Tile Mat for just $16.81 (regularly up to $35).

This mat measures 24 square feet when assembled with the six interlocking pieces. It is made of a lightweight and durable EVA foam. Even better, it’s super easy to assemble, just snap the pieces together in any configuration and you’re ready to go. Create a workout area, add cushion to hard flooring for a playroom and more!