Thanks so much! The hotel responded quickly and knew exactly what I needed. Cheers.

I don't need a visa (have a 10yr) but my sister is staying with me and she needs the tourist visa. While some consulates will accept an itinerary in lieu of an invitation letter, a letter is preferable. In our case our itinerary is a bit unusual so I wanted a letter. The reservation is in my name not hers (her name is on the reservation but not shown in any of the confirmations I could generate online), so it makes it that much more of a potential problem.

An invitation letter written in Chinese is the best way to avoid any problems. One of the perks of booking a full-service property is you hope they can do things like this and quickly. So I'm quite satisfied with that!