Is it possible to apply for a patent after improving an original utility model?

First of all, your improvement should be novel, creative and practical, and then you can apply for a patent with your improvement (point out the shortcomings of the original patent and tell how your improvement can make up for the shortcomings of the patent) and ask for rights protection, so the application is allowed! But you must first make sure that someone is willing to pay for your invention (few people are willing to pay for an idea now unless your patent is monopolistic), because it costs money to apply for a patent. There are many applications for patents now, but only a few can be sold.

However, even if your patent application is authorized, the implementation of your patent depends on the prior utility model, so if you want to implement your patent, you need to get the consent of the patentee of the prior utility model. If the patentee doesn't agree, you can submit a "compulsory license" to the "the State Council Patent Administration Department", and you can only implement your patent after obtaining the license, and also "you should pay the patentee a reasonable royalty, the amount of which shall be negotiated by both parties; If both parties fail to reach an agreement, it shall be decided by the patent administration department of the State Council ".