Choi

The provided news articles do not contain any information about a person named "Choi." Therefore, it is impossible to provide a summary about them based on the given context. The articles discuss a bus hijacking in Hong Kong by a man claiming to have AIDS, Hong Kong's finance chief Paul Chan's assurance about the city's debt management, and the popularity of Hong Kong-themed merchandise at a Lunar New Year fair. None of these topics relate to an individual named Choi.