The Hello Kitty murder case (Chinese: Hello Kitty藏屍案; Jyutping: Hello Kitty cong4 si1 ngon3; Cantonese Yale: Hello Kitty chòhng sī ngon; lit. 'Hello Kitty hidden body case') took place in Hong Kong in the spring of 1999, when a nightclub hostess was abducted in Lai Yiu Estate, tortured and raped in an apartment in Tsim Sha Tsui, Kowloon, after stealing a wallet owned by one of her frequent customers.

Fan Man-yee (樊敏儀; Faan4 Man5 ji4; Fàahn Máhn-yìh, 23) was held captive by three men and one girl before dying between 14 and 16 April 1999. Her body was decapitated and her skull placed inside of a Hello Kitty mermaid plush.

Born in 1976 in Shenzhen, Fan Man-yee was abandoned by her family as a child, resulting in her being raised in an all girls' orphanage in Ma Tau Wai. When she turned 15, she was told to leave the orphanage because they had an age restriction. Becoming homeless and addicted to drugs, Fan was forced into street prostitution, and at age 21 began working at a brothel named Romance Villa, located in Sham Shui Po. Fan eventually married one of her clients, a fellow drug addict named Ng Chi-yuen (吳志遠; Wú Zhìyuǎn), in 1996. She gave birth to their son two years later in November 1998, roughly five months before her murder.

Fan's husband was described as abusive and neighbors in their Mong Kok apartment building would report being awakened by sounds of the couple's fights and the child's screaming and crying. Upon her pregnancy and then the birth of her son, Fan decided to turn her life around in order to protect her son and provide him a safer life. She quit drugs and prostitution, got a job as a hostess at a nightclub named Empress Karaoke Club, and eventually left her violent husband shortly before her murder. Due to these sacrifices, she had a much lower income and struggled to support herself and her family.

Chan Man-lok (陳文樂; Chén Wénlè; can4 man4 lok6, alias Ah Lok or Ah Hsi, born 17 May 1965), a 33-year-old Wo Shing Wo triad member who had exhibited problematic behavior since middle school and had previous convictions for drug trafficking (in 1991), was one of Fan's regular clients at the brothel. In early 1999, Fan stole Chan's wallet, which contained about $HK4,000 (roughly US$500). When Chan realized what had happened, he demanded Fan return the money in addition to a fee of $HK10,000. Although Fan immediately returned the stolen money, she needed more time to secure the additional fee.

On 17 March 1999, Fan was abducted by three men and one girl at her flat in the Fu Yiu section of Lai Yiu Estate: Chan; his grooming victim Lau Ming-fong (劉明芳; Liú Míngfāng; lau4 ming4 fong1, alias Ah Fong, 14), Leung Wai-lun (梁偉倫; Liáng Wěilún; loeng4 wai5 leon4, alias Gangsta 1, 21), and Leung Shing-cho (梁勝祖; Liáng Shèngzǔ; loeng4 sing3 zou2, alias Gangsta 2, possibly 26, boyfriend of Lau). The group took Fan to an apartment at No. 31 Granville Road, Tsim Sha Tsui, where they imprisoned her for a month. The apartment was rented by Chan himself, but was owned by two men referred to as Ah Sam and Ah Kao, who were not involved in gang activities. Initially, Chan had intended to make money off of Fan by pimping her out to other men.

Prior to the kidnapping, both Leung Wai-lun and Leung Shing-cho worked at a retail store nearby Granville Road.

During her imprisonment, she was tortured and raped. According to one source, she was beaten with metal bars, sometimes while being strung up and used as a punching bag. On one occasion, Fan was kicked in the head around fifty times. Spices were rubbed into Fan's wounds, her legs and feet were burned with candle wax and hot plastic so that she was unable to walk. She was forced to smile and say she enjoyed the beatings; if she refused, they subjected her to even harsher torture. This treatment eventually led to traumatic shock and ultimately death.

Fan succumbed to her wounds between 14 April or 15 April 1999. Some sources claim that she died while her captors were out, while others say she died overnight. Upon discovery of Fan's body, her captors dismembered and boiled the remains; her skull was sewed inside of a Hello Kitty doll filled with dead insects while the rest of the body was discarded. Only her skull, one tooth, and some internal organs were recovered in a plastic bag, after Lau led the Yau Ma Tei police to the scene on 24 May. Three police officers, Chiu Ka-hsue, Sin Tim-wah and Andrew Yip Yan-ling, all from the Yau Ma Tei Police Division No. 539, were the first officers who arrived at the scene. Other parts were recovered from trash dumps in Sham Shui Po, Wan Chai and Tai Kok Tsui.

At the time of the arrest, Chan was living with his wife Ah Pui (real name Tse Pui-ling, 謝佩玲; Xiè Pèilíng) and his newborn baby at an apartment in the Shek Ning section of Shek Lei Estate. The apartment was raided by SWAT officers on the early morning hours of 28 May. Tse was first suspected to be involved in the murder, but was quickly released after no evidence was found. After finding out the murder made it to the media via a Macau-based local newspaper, Leung Wai-lun fled to mainland China (Guangxi) before getting caught by the police on 14 February 2000, after irregularities were found in his passport. Prior to the arrest, Leung was put on Interpol's most wanted list. He was sent back to Hong Kong on 17 February for trial.

Fan's skull was identified on 3 June, after a "photo overlapping method" at Lockhart Mortuary, and the skull was moved to Kowloon Public Mortuary after the trial.

On 7 December 2000, after a trial which started on 20 October, the three men were convicted of manslaughter with a vote of 6:3, as the eight-man and one-woman jury ruled the remains were not sufficient to show whether Fan was murdered or died from a drug overdose. While the jury could not rule that the men intended to kill Fan, they did determine that she had died as a result of their abuse. Lau testified at the trial in exchange for immunity. During the trial, Chan and Leung Shing-cho denied killing Fan, although they did not deny dismembering her body. Chan's wife Tse Pui-ling, Fan's husband Ng Chi-yuen and Fan's aunt also testified in court. After the guilty verdict, Leung Wai-lun's sister reportedly experienced a mental breakdown, while Leung's brother slammed and broke the court door, causing damage.

Justice Peter Nguyen, who sentenced the trio to life in prison with the possibility of parole, stated, "Never in Hong Kong in recent years has a court heard of such cruelty, depravity, callousness, brutality, violence, and viciousness." Psychiatric reports of Castle Peak Hospital and Siu Lam Hospital described the three as "remorseless". There would be no review for parole for twenty years. Chan Man-lok and Leung Wai-lun are currently serving their life sentences in Stanley Prison.

Former TVB reporters Carmen Luk and Mimi Yeung attended the trial, with Luk describing the court scene as "crazy and scary".

Chan lost his appeal on 13 August 2007, by the request of the court.

Fan's skull was the only exhibit in the case. After the trial, it was kept by the forensic pathologist in the Kowloon Public Mortuary until the appeal process of the prisoners was completed, and her birth family was notified in March 2004 that the skull would be returned and cremated on 26 March.

The apartment building in which the crime took place was demolished in September 2012 and has been rebuilt as a hotel named Soravit in 2016. Three buddha portraits were placed in the hotel as a memorial.

A necklace that belonged to Fan was handed over to Fan's son after it was discovered in the refrigerator during the investigation.

The publicity around the case resulted in the production and release of films that told the story. Both Human Pork Chop (烹屍之喪盡天良) and There is a Secret in my Soup were released in 2001.

Leung Shing-cho, who managed to reduce his sentence from life to eighteen years on appeal in March 2004, was released in April 2014. Eight years later, Leung was arrested and sentenced to jail once again for twelve months in August 2022 for sexually assaulting a ten-year-old girl.

• Eight Immortals Restaurant murders
• List of kidnappings
• List of solved missing person cases
• Murder of Junko Furuta
• Murder of Abby Choi

• Trio sentenced to life in jail for gruesome killing in H.K – Asian Economic News, 11 December 2000
• Human Pork Chop at IMDb 
• There is a Secret in my Soup at IMDb