Are the examples in the patent only about what the invention involves?

The definition of an embodiment in the patent examination guide is as follows: An embodiment is an example of a preferred specific embodiment of an invention or utility model. The number of embodiments should be determined according to the nature of the invention or utility model, the technical field it belongs to, the existing technical situation and the scope of protection.

In other words, the embodiment is an example of the content of the invention, and other inventions or products cannot be written. If it is compared with the existing technology, it can be written in the background technology.