This help me
Formally, a bean X is said to specialize another bean Y if either:

• X directly specializes Y,
• or a bean Z exists, such that X directly specializes Z and Z specializes Y.
  I remove @ETC and put @Specializes

@Named
@Stateless
public class A {}

@Stateless
@Specializes
public class B extends A {}

@Stateless
@Specializes
public class C extends B {}

@Stateless
@Specializes
public class D extends C {}

When you call #

injection point resolved is class D.