Can increase many to many cardinality?

[Jackxwb]

Referring to the many to many relationship in Java JPA, it is used to express the following diagrams

Its actual working mechanism involves automatically creating an intermediate table, resulting in a structure akin to the one below

The current cardinality numbers may convey incorrect meanings in the illustration (as shown in Figure 1)

[1ilit]

This is intentional. To have a many to many relationship in sql you need to have a join table