1. The same technical content of foreign patents, whether they are applied for in China or not, will affect the re-application of patents in China. Patented technology can be legally copied in China, which is an open technology. If you don't apply for a patent in China, you can't get protection in China.
2. A patent application is only partially the same as a foreign patent, and a patent can be granted by modifying the claims in the application, deleting the same part and retaining the innovative part of the application.