Can I apply for a patent by combining two technologies of others into a new technology?

Personal understanding, for reference only. First of all, it does not constitute plagiarism, because the principle of the patent system is to exchange publicity for rights. When you are authorized, your patent will be made public. When it becomes invalid, your technology will enter the public domain and everyone can use it. However, the application for a patent for utility model is generally only subject to formal examination, which causes the problem that you are still authorized after repeated applications. (Of course, if your application for a patent for utility model is beautiful, and you also applied for a copyright registration, you can use copyright to protect your technology. There are many cases of this situation in appearance patents. You can also try the utility model, but you can't judge because you haven't read your patent. Secondly, please confirm the announcement time of your utility model patent. If before the filing date of the latter patent, you can invalidate the latter patent with the contents disclosed in your patent, and the latter patent lacks novelty and/or creativity (the specific reason for invalidation should be determined by comparing the claims of the two). That is, put forward an invalid request for the latter patent to the Patent Reexamination Board. Thirdly, if you cooperate with others to produce your invalid patented product, it may still be identified as infringement. However, the patentee of the later patent needs to produce a patent evaluation report when exercising the patent right. The patent evaluation report needs a substantive review of the patent, and you may be able to find your previous patent. However, it is safest to declare later patents invalid on the grounds of lack of novelty and creativity.