Identify and provide a list of potential clients in Hong Kong

I represent South African wifi technology startup. We will be demo'ing some of our technology at a large conference in Hong Kong in July. We specialise in high capacity wifi deployments for events. We’ve recently built some world-first technology that we’d love to demo to potential clients while we are in Hong Kong Possible clients include: event production companies, internet service providers, event wifi companies, marketing agencies, brand activation companies, wifi companies, event organisers. I need a list which includes: Company name: What industry is the company in: email address: Website: Office address in hong kong: Do they have offices in other countries? if yes, where Company size (small, medium, big) Any other info?