Billy Mak Sui-choi

Billy Mak Sui-choi is not mentioned in either of the provided news articles. Therefore, it's impossible to provide any information about his background, newsworthiness, recent events related to him, or his current relevance based solely on the given context. The articles focus on Hong Kong's economic outlook, including inflation risks due to the Middle East conflict and the city's unexpected budget surplus driven by IPOs and bond sales. The Financial Secretary Paul Chan Mo-po's budget speech is also referenced, highlighting the improved financial health of Hong Kong.