This is a pillow. Similar for millennia used the Chinese dynasties. They were made of wood, bamboo, but porcelain pillows decorated with drawings of plants, people, animals and traditionally rectangular in shape were considered the most exquisite. Hard pillows were preferable due to the prevailing belief that soft substances take energy and have a bad effect on blood circulation. It was believed that pillows had a magical effect, they were a kind of talismans that protected their masters during sleep from evil spirits and negative energy