Ice crystal cakes are real. Ice crystal cake, also known as crystal cake, is a specialty of Hangzhou, Jiangsu. It is made from rock sugar and glutinous rice through a series of complex processes. It has a soft, waxy texture and is sweet but not greasy. Existence means that things continue to occupy time and space, actually exist and do not disappear. In philosophy, existence refers to the objective world that does not depend on or depend on human consciousness, that is, matter. In addition, existence also includes the existence of consciousness, as well as the existence of entities, attributes, and relationships. The word existence has many expressions in Western philosophy. The first person to use this word was the ancient Greek philosophy Parmenides. He proposed that "existence is the origin of the world", and for the first time put forward an abstract concept on the issue of ontology.