 and gently undulates, smelling of mown lawns blended with bird droppings. It's not a silk carpet, not yet. This entire front room is covered in leafy white mulberry branches, and greedy saltworms are setting to work as each fresh branch is laid down. The worms never sleep, and they won't eat dried leaves, so we have to get up early to feed them, and don't go to bed until late. It's a lot of work, Bibi Han explains in a hushed voice.