Haven’t done solo with ABD but have traveled through China extensively through the years including 1995 - a 2 week solo backbacking trip through central / southwest China in my early 20s.
Having been on Disney Cruises including a medical debark for my dad. The ship sent a castmember to be with us for the two days we were on Nasau. There is no way ABD castmembers will allow you to feel left out. Same with getting lost, but locals are so friendly in China that on the off chance you do get lost, you will get a lot of help immediately.
I just came back on a 2 week trip and 6 cities in China with my family of five and can confidently say you will be fine traveling alone in China, even if you weren’t with ABD.