In addition, the patentee looks at the place of registration. Huawei, ZTE and Datang are all enterprises in China, but their patent applications are all over the world, and they have applied for patents from any country, including American patents, European patents and China patents.
Therefore, it can only be said that a large part of them are patents applied by domestic enterprises or institutions.
In addition, don't be superstitious about independent research and development. Independent research and development also infringes on other people's patents. It is impossible for anyone to develop a set of modern technology without using other people's technology.