Spring register advisor

I am so confused that how Spring register the advisor when startup.

my situation is define Advisor that extends from AspectJExpressionPointcutAdvisor like below

public class TestAdvisor extends AspectJExpressionPointcutAdvisor {          

}

I don't mark this class with @Component, then I create another class that used to create TestAdvisor in some condition

@Component
public AdvisorContext implements InitializeBean {
     @Autowired private ApplicationContext ctx;
     @Override
     public void afterPropertiesSet() throws Exception {
        if(conditionMatch()){
            AutowireCapableBeanFactory bf = ctx.getAutowireCapableBeanFactory();
            TestAdvisor advisor = bf.createBean(TestAdvisor.class);
            advisor.setExpression("expression");
            advisor.setAdvice(ctx.getBean(TestAdvice.class);
        }
     }
}

I am sure this afterPropertiesSet() has been called, but the advisor didn't take effect.

if I mark TestAdvisor with @Component, then the advice works.

Are there any other extra steps I have to do in order to add advisor?

thanks