The "Six States Installation of Minister" murder case () was a dramatic murder case that occurred in Hong Kong during the 1950s. The case was considered to be one of the most serious murder cases at the time, and was sensationalised by the media. Etymology The name of this murder case was derived from a Cantonese opera "Six States Installation of Minister" (), an opera set in the Seven Warring States period. Just before the murder, the murderer told his sister-in-law that he is about to do a rendition of the opera, and start killing Despite the murder itself had been forgotten, the phrase "Six States Installation of Minister" () has, in the decades since, entered popular vocabulary in Hong Kong to describe a chaotic, fierce argument or conflict. Background Exile to Hong Kong When the People's Republic of China was formed in 1949, Nationalist military officer Chu Shing-choi () escaped China to Hong Kong to rendezvous with his brother, Zhu Xingcai (). Zhu Xingcai was a merchant, and was in the United States at the time. As a result, Chu Shing-choi stayed at his brother's residence. During those times, it is common for flatowners in Hong Kong to sublet individual rooms to other people. So, Chu was, in fact, living with numerous other families: Zhu Xingcai, his wife Kwan Yuet-ngo () and their son. The sister of Guan Yue-E, Guan Yue Mei (), her husband Wang Ji Soeng (), and their three children. The brother of Guan Yue-E, Guan Hong Sang (), his wife Chan Chiu (). Maid Wong Mei () Widow Wu Sam Gu () The sister of Wang Zi Xiang, Wang Yi Man () Tension When Chu Shing-choi came to Hong Kong, he brought with him a small fortune that is sufficient for him to start a small business. However, Chu blew through his savings within a year, and began to borrow money from his sister-in-law. It was at this time that Chu's sister-in-law began to insult and belittle him. In addition, Chu's relation with the widow Wu San Gu, which was seen by Chu's sister-in-law as endearing, also drew fierce criticism, and this also caused Wu San Gu to leave the residence. In actuality, Chu Shing-choi liked Wang Qi Wen, and he moved with her to Shek Kip Mei to escape from his sister-in-law's insult. Preparations for murder During one fierce argument, Chu threatened to eventually