What does the tattoo on my brother's body mean in the grave robbery notes?

This is the unicorn, the symbol of his family.

Zhang Qiling's upper body is tattooed with Kirin, which is blue-black, with long forest antlers, stepping on fire to burn the wind. It usually disappears and only appears when the body temperature rises. After intense exercise or close combat, there will be a complete pattern similar to "Kirin stepping on fire". (In the internal system of the Zhang family, the Zhang family has a long unicorn tattoo, which represents the "contract" with the family mission. )

In the novel, the Zhang family uses the Kirin totem as a symbol of their family, while Zhang Qiling's Kirin tattoo is a family tattoo, which can only be obtained by the patriarch, and it can also be said to be a symbol of the patriarch of the Zhang family.

Extended data:

In the novel Tomb Raider Notes, in fact, Zhang Qiling is not the only one who has a unicorn tattoo. It is said that the Miao leader who blinded Chen Pi's eyes with a flying knife also has this unicorn tattoo, and so does Ma Pan's father. In the original work, it is said that this tattoo is used by Miao people to prevent any diseases, and some people say it is a map of Miao village;

Or a map of the Zhang family in Gu Lou, tattooed on the body to guide the way. There is also a saying that the function of Kirin tattoo is to ward off evil spirits. The tattoo of black unicorn tattooed on Zhang Qiling's body can help him subdue evil spirits when fighting zongzi in the tomb. Opinions on Kirin tattoos are particularly complicated.