From Jiu Shu's world

"Red string ink fights rooster blood, yellow talisman peach wood overcomes evil spirits."
When a boy born with a black coffin was born with a birthmark, he apprenticed to Maoshan, and when Maoshan's shamanistic lineage was reinvigorated by him, the story of Taoism and Gushu seemed to start with the knock on the door of Renjiazhen Yizhuang:
"Master, I'm here"