Utility model.
From the perspective of market prospects and competition, if a utility model patent has very good market prospects after it is released, then the gold content and value of the patent will virtually increase a lot.
Gold content, originally the content (quality) of the metal "gold" in gold jewelry and gold products, expressed in k, the gold content per k (abbreviation of English carat, German karat, often written as "k") is 4.166%. It is often extended to describe the inherent quality of something.