Cao Yan Bing/History

Past
As a child his parents left him without a word, having to carry the burden of his family and having to protect his brother. One day, he saved a female spirit, as a token of thanks, she decided to look after the brothers. Gradually he began to think of her as a sister, but unfortunately the good times didn't last long. On a certain day, evil spirits invaded their home, with his guardian spirit dying in battle, unable to get up. The monsters found it amusing to violate the girl in front of him, while treating her as food, witnessing his own sister being swallowed, right before his eyes. From that night on he swore an oath to find the beasts and rip them into pieces.

Prologue Arc
After witnessing Cao Xiao Liang's sparing match against Xu Chu, he calls for them them to end, telling his brother he's full of openings when in battle, and informs him he doesn't have enough spiritual power to defend himself or Rakshasa Street, and tells him to keep training.

Intruder In Rakshasa Street Arc
Cao Yan Bing is seen in the human world, walking down a street, until a girl a knocks him over, causing him to spill his take away on the floor. After being knocked over the girl begins to run away, annoyed he shouts over towards her telling her not to run away, after knocking someone's takeaway, claiming if he sees her again, that he won't forgive her. He later arrives at Architectural Design Company, telling the people inside there take away is 37 Yuan in total. After being given his change, he notices the girl who knocked him over, from earlier, who waves towards him and greets him with hi. Cao Yan Bing then throws his helmet towards her, which bounces of her head, and tells her how dares she says hi, claiming she screwed him over. After asking for his money, for his emotional pain he threatens to smack her on behalf of her mother, the girl then uses her martial arts to put him through the glass window.

Cao Yan Bing is later seen in Rakshasa Street getting his wounds seen to by his brother Cao Xiao Liang whom he tells that, the girl was "strong as an Ox". Xiao claims it's interesting that someone could hurt, to which he asks is he making fun of him. Xiao then mentions they received a spirit voice mail from Demon Sign San Tong about fighting an organization, and asks if they should respond. Yan Bing tells him not worry about it, as he doesn't want to be the first, and there's plenty more Rare-Soul Users out there, and asks he isn't he meant to be a strong Rare-Soul User anyway. He claims if anyone dares to trouble them, let them come. As what's important is how they are going to deal with their financial problem. After suddenly becoming silent as he listens out for something and asks Xaio did he hear it, to which he agrees. Cao Yan Bing smirks and claims a bunch of idiots came to play.

Standing on a tall building, he views the number of number of departed spirits, claiming it's interesting. Making his way to ground, his brother tells him to take it easy as he doesn't want to that sister, he replies telling him he knows already. After it making to ground he introduces himself as the Requiem General of Rakshasa Street, and then unleashes his attack "Great Sky Rendering Fire Hammer". He tells his brother its fine if he doesn't help, just don’t chat. Recognising the voice of the girl, he turns around and points his finger claiming it's her. He asks her why does she keep causing problems for him, she claims isn't this too much for a movie set, to which to tells her he has no idea what's going on in that brain of hers. He then squeezes her checks together claiming she's so noisy and asks her to shut up, as it looks like there just starting started, after the arrival of the departed spirits leader.