Victor Li Tzar-kuoi, son of Li Ka-shing, was named in court for the first time yesterday as a kidnap victim of 'Big Spender' Cheung Tze-keung.
During the first two days of Cheung's trial, chief judge Wang Min had refrained from identifying the younger Mr Li by his full name.
But yesterday he was forced to do so to avoid mixing him up with his father, witnesses said.
The court yesterday continued to discuss Cheung's alleged role in the kidnapping of Mr Li.
In court were Cheung, 44, Chan Chi-ho, 36, Chu Yuk-shing, 42, Or Yin-ting, 48, and Lu Zhiping, 31, all answering questions from the panel of three adjudicators.
Lu is a mainlander who is accused of smuggling weapons to help in the kidnap, while Chan, Chu, and Or are Hong Kong men, described as Cheung's right-hand men.
Cheung is said to have masterminded the kidnapping of Mr Li in Shenzhen in early 1996, when he teamed up with Yip Kai-foon, now serving a jail term in Hong Kong, to smuggle weapons across the border.