1, knowledge: "Dragon" is a mascot in China culture, representing glory and success, while "book" is a word representing knowledge and knowledge, giving people a literary atmosphere, which can imply that this person has good knowledge and cultural accomplishment.

2, moral standards: "Qing" means clear and pure, representing a fresh and natural feeling. The name implies that this person is pure, artistic, kind and has a high moral standard. It's a good name.