What does it mean to sign this book and make it last forever?

Of children and grandchildren thriving.

The origin of the idiom: "Poetry, Elegance and King of Literature": "The grandson of King of Literature will never die." Mao Chuan: "Ben, Ben Zong also; Branch, Zhi Zi also. " Zheng Xuan wrote: "His descendants are suitable to be emperors, princes and immortals."

Example of idioms: The ministers of the five generations of husbands, who serve the monarch with Tao, care for flowers and trees, repay kindness with benevolence, and get the blessing of Tao, are immortal. ◎ Biography of Five Children in the Later Han Dynasty

Traditional writing: this branch is perfect.

ㄅㄣˇㄓㄧㄅㄞˇㄕㄧˋ Athena Chu

Synonym of this immortal: this immortal sees "this immortal".

Idiom grammar: as predicate and object; (of a person) be blessed with many children and grandchildren

Emotion and color: neutral idioms

Idiom structure: compact idioms

Generation time: ancient idioms

Happy generation of roots and branches