Catalina seaplane Miss Macao (VR-HDT), operated by a Cathay Pacific subsidiary, with 23 passengers and 3 crew on board flying from Macau to Hong Kong is hijacked mid-way over the Pearl River Delta by a group of 4 hijackers attempting to rob the passengers on board.
The pilot is attacked and loses control during the ensuing struggle in the cockpit. The subsequent crash kills all on board except one passenger, who was later identified as one Wong Yu, the lead hijacker.
The object of the plot was to rob wealthy passengers and hold them for ransom. He was brought to court by the Macau police, but the Macau court suggested that the prosecution should be brought in Hong Kong instead, since the plane was registered in Hong Kong and most of the passengers were from there.
However, the British colonial government in Hong Kong stated that the incident happened over Chinese territory in which the British had no jurisdiction. Since no state claimed authority to try him, Wong was released without trial from Macao Central Prison on 11 June 1951 and was then deported to China (by then the People's Republic of China).