What's the story of Chinatown Detective 2?

"Detective Chinatown 2" tells the story of a serial murder case solved by a detective team of Tang people and Qin Feng in new york. The film is set in Chinatown, New York, and focuses on finding the real murderer who killed his seventh uncle's grandson. In order to win a huge bonus, the Tang people tricked Qin Feng into taking part in a world-famous detective competition, and the content of the competition was to find the murderer of this murder case. In this process, the two men not only have to solve complex cases, but also face the entanglement of the police, the threat of gangs and the competition of other detectives. With the deepening of the investigation, they found a bigger conspiracy, involving human organs and the five elements of Feng Shui, which made the whole case more confusing. In the climax of the film, they exposed the truth of a doctor who killed people in series in order to prolong his life, and finally brought the murderer to justice. The whole story is full of suspense and jokes, showing the wisdom and courage of the Tang people and the detective team Qin Feng.