China is great, and I hope you will have some time to do some sightseeing along the way.
Since the details of your travel will be arranged for you count yourself lucky. China is a bit like the US in that tourism is geared for it’s own citizens first. The Chinese like to visit other parts of China and their tourism industry is focused on that, so unlike many other countries were you can get by, at least in tourist areas, on English, China you really can’t. At least outside of your start and stop cities, and even there you can run into trouble.
And of course the trouble is that even in those cities the places that do cater to the English speaking tourist are either high end places where you are removed from contact with the local Chinese, or tourist traps that are sub par.
On the up side the people are generally very friendly and patient, so if you venture out to non touristy places and just do your