Cooking red dates will have a little foam, harmless, just floating foam, make people look uncomfortable. To remove the white foam of jujube, can use a piece of tin foil about the same size as the mouth of the pot, crumpled and then unfolded, and then put it into the jujube soup, as long as it is on the surface on the line, take it out and you will find that there is no more bubble end on the surface of the sweet soup. This trick is very useful, whether it is rib soup, green vegetable soup ah what as long as there is bubble end can be solved.