Recent discussions between mainland China and Hong Kong over a timeline for reopening borders represents a major step forward for Macau’s gaming operators, industry experts say. A number of media outlets reported late last week that authorities are looking to implement a trial starting in December that would allow Hong Kong travellers to enter mainland China without having to quarantine. The trial would be limited to Guangdong Province initially, with Shenzhen as the sole entry point, a daily visitor quota in place and travellers subject to a health code system. Each person would have to present a green health code…