Luo Ergang had spent as long as 55 years in annotating LIXIUCHENGZISHU before the supplemental edition of LIXIUCHENGZISHU YUANGAOZHU was finally published in 1995. During that time, he did much detailed and trivial work in annotating and adjusted the annotation edition for 3 times. Mr. Luo's work can help the subsequent researchers to comprehend LIXIUCHEGNZISHU precisely. Moreover, his virtues such as being content with loneliness, perseverance, modesty and being ready to accept good advice are also precious legacy for later generation.