Explain in detail the meanings of "the same root", "the same root in the left library" and "the head stem" in the eight characters.

The eight-character combination of Zuo Ku Lian Gen has four branches: Bing Xu, Xin Chou, Ren Chen and Yi Wei.

For example, the eight characters born on June 16 of the lunar calendar (dog) are: easy to be ugly. Four pillars and heavenly stems are all combinations of sitting in the library and taking root.