What does adding the title of County King mean? Can you be more specific?

He still holds the title of Baylor or Beizi, but enjoys the treatment of a county king

Because he is young or has insufficient military merit, he cannot be directly named a county king. This is the difference between adding and sealing.

In fact, the title of Lord Belegar is the rank between Baelor and County King

Of course it is still the original title, because after all, he is not a County King