Cheng was a 42-year-old gang leader who had black pompadour hair and dark brown eyes. At the time of his death, Fang donned a gray tiger stripe-printed fur coat and two golden chains. It was known that Cheng was a smoker.
Cheng was found in the Great Wall of China with a plastic bag covering his head. Jack and the player deduced the bag was used to suffocate him—registering the plastic bag as the murder weapon. With May Douglas' little help, Angela also determined Cheng's killer poisoned him with camphor to disorient him and commit the murder without him putting up a fight. Angela determined the killer knew traditional Chinese medicine to calculate the required amount of camphor to do so.
Relationship with suspects
Cheng's pickpocketing gang recruited many street children, including Bai Bai—whom Cheng had beaten bloody with a belt after discovering that he was keeping his share instead of handing it over—and Tsukada Chieko, who had left the gang and worked as a waitress after her brother (who was also in the gang) disappeared. Cheng was also looking to recruit Sanjay Korrapati after witnessing his skills but Sanjay rejected the offer as he had "a better future". Cheng used the money to finance his wife, Fang Di Yun. Yun and Cheng started off poor and so Yun reminded Cheng not to be too reckless or they might lose all their wealth. However, Cheng took precautions, even bribing government official Hei Qian to turn a blind eye to his operation.
Killer and motives
The killer turned out to be Yun.
After she denied involvement, Yun said that she killed her husband in order to stop his cruelty with the children in his gang. Yun was pushed to her limit when she found out Cheng beat Bai Bai with a belt. Judge Adaku sentenced her to 10 years in jail for the murder of Fang Cheng.
- Cheng's death at the hands of his wife is one of the instances of domestic homicide in World Edition.