I think this service comes and goes, depending on if an outbreak of bad cold/flu/other illness is present in HK or not. Government Health Department rules. This was the case for me when giving birth last year at QMH so I never got a tour. But ask about it at Tsan Yuk. If there's no outbreak or perceived risk, then they will put your name down on the list to attend the English (Held on one Saturday a month if i recall correctly) sessions. But they do book out very quickly. And even if you are on the list to attend a tour, they may be cancelled at any time, as per Health Department instructions. Good luck