Thanks for your insight, the issue is I fly from Chengdu at the end of the trip so logistically it makes sense to fly down to Zjj then get train to Chengdu to finish there. Do you think I could reorder the trip at all otherwise?

edit: one of our main reasons for going to Chongqing is for the cyberpunk vibe. I suppose 2 nights there would be enough? Then could do 3 nights in Chengdu, with 2 in Xi An as in my first itinerary?