i've had 2 chinese (separate) and they were identical in their behaviours and likes etc. firstly i had them both in a double level imac with sleeping hut and stash hut on the ground floor with loads of bedding. They love to make burrows and dig. they then had the next level with wheel, food, water, toys etc. and lots of toys. they like jam packed toys as they're so slinky and bendy they weave in and out of them. they also love climbing and enjoyed climbing the bars and any toys they could climb on/through.
they didn't like the loft bedroom. they very much wanted the bed downstairs, like a kind of burrow, so whatever you get, don't get anything with a loft bedroom. both of mine were upset at loft bedrooms and just stuffed the tube with bedding until they couldn't get down. i had to clear it every day
they stopped that behaviour when i moved the bed to a lower level. they're secret and like secret hidey holey type thing. i use bendy bridges to conceal the nest and stash igloo entrances.
my recommended cages would be no. 1)imac with extension level and downstairs bedroom and no.2) savic cambridge with igloo or other house under a low shelf and concealed entrance some how.
feel free to ask more questions if i can answer them i will.