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 his brother's sparing match against Xu Chu, he calls for them them to end it. Cao Yan Bing explains to Cao Xiao Liang that he is full of openings when in battle, as well as not having enough spiritual power to defend himself or Rakshasa Street, and orders him to keep training.

Intruder In Rakshasa Street Arc
Cao Yan Bing is introduced walking down a street until being knocked over by a girl. Which causes him to drop the food he was carrying onto the floor. As the girl begins to run away, annoyed he shouts for her not too run away. Getting up, he promise if he sees her again, that he won't forgive her. Later on, he arrives at Architectural Design Company. While in there he confirms that the take away is 37 Yuan in total. After being given his change, he notices the girl who knocked him over, from earlier on. When she waves towards him and greets him with hi. Cao Yan Bing throws his helmet at her, which bounces of her head. Annoyed he tells her how dares she greet him after she screwed him over. Asking for 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 getting his wounds treated 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 about receiving a spirit voice mail from Demon Sign San Tong, asking 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 mentions 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 departed spirits, claiming it to be interesting. Making his way to ground, his brother tells him to take it easy as he doesn't want to that sister. 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". Telling his brother its fine if he doesn't help, just don’t chat. After recognising the girl's voice, he turns around. Pointing his finger he claims it's her. Suddenly, he questions why she keeps causing problems for him. When the girl asks isn't it too much for a movie set, he 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 a departed spirit.