Unfortunately you possibly won’t see fried ice cream in China…it is originally from Japan and has taken off in western Chinese restaurants. The Chinese however do have interesting ice cream ( on a stick) flavours such as green pea, sweet corn, red bean etc. While they sound strange, they are good to try and surprisingly tasty.
Dumplings (Jaio Zi) are very tasty and hopefully when on the tour they will take you to a dumpling restaurant to see how they are made/to try. Wheat noodles (where pasta originated) is also common in China and hopefully you will be able to see them thrown by hand. I recall in Xian going to a restaurant that specialised in hand thrown noodles.
Another common snack food readily available, particularly in between meal times is Baozi. Types of savour fillings is endless. another is tea eggs which are delicious if one likes eggs…I could keep going on and on but am sure you will try many foods yourself.
BTW, if eating fruit, make sure you remove the peel…not a problem for most fruit but something that is often recommended for things like apples etc. Also drink bottled water as tap water is of mixed quality…just check the seal is not broken before purchase (a broken seal possibly means the bottle has been refilled).
Also, the other suggestion is when venturing from the hotel independently, take a business card from the hotel (some hotels have details on their keys) just in case you get lost or don’t feel like the walk back. Taxis are very common in China and relatively cheap to get around. The taxi’s rates are posted on small stickers on the (back) side window.
It is also worth getting a free translator app on your phone before leaving which includes Simplified/Standardised Mandarin. This may be useful when communicating with locals when out and about. Some will also do photoed text translations and speaking.
Wifi is available widely in China (hotels, restaurants, shopping malls etc). I wouldn’t use it to do any private (e.g. online banking) purposes as one has to assume that any Wifi communications in China could be listened to (particularly since most common western encrypted VPNs won’t work).
Take care and have a great trip.