Buddhism, entering China around AD 200, brought with it the idea of (the Buddha) sitting upon a raised platform instead of simply mats. The platform was adopted as an honorific seat for special guests and dignitaries or officials. Longer versions were then used for reclining as well, which eventually evolved into the bed and daybed. Taller versions evolved into higher tables as well. The folding stool also proliferated similarly, after it was adapted from designs developed by nomadic tribes to the North and West, who used them for both their convenience and light weight in many applications such as mounting horses. Later, woven hourglass-shaped stools evolved; a design still in use today throughout China.