Hongkongers were most angry on the day all restaurants were banned from providing dine-in services, according to the latest big data research which has found local social media platforms were flooded with negative emotions following the controversial policy, forcing the government to withdraw the move.The research was done by Wiser, a market intelligence service provider, to elicit public opinion amid the Covid-19 pandemic. It was based on 400,000 posts across various social media platforms,…