Hi, I'm looking for some itinerary advice for the middle part of my first trip to China in September.Starting point Xi'an 9/10 afternoon/night flight south. Ending point Hong Kong 10/1 via Shenzhen.

I'm looking at eitiher itinerary A (West to East): Xi'an, Lijiang, Dali, Kunming,Guilin,Yangshuo, Shenzhen,HK . or itinerary B (East to West) Xi'an, Guilin, Yangshuo, Kunming, Dali, Lijiang, Shenzhen, HK. Has anyone done either of these journeys? Any advise?

Details of A:
Xi'an to Kunming flight( $126) -quickly find bus or train to Dali
Dali 1-2 days - train/bus to Lijiang
Lijiang 1-2 days -
fly Lijiang back to Kunming - ($74-$126)
fly Kunming to Guilin ($158) -quickly bus/car to Yangshuo - Is this 'quickly' really possible? I don't think I have any interest in spending time in Kunming or Guilin except for transport hubs.
Yangshuo 3-4 days - rafting, explore, bikes,hostels
bus/car to Guiling for flight to Shenzhen $80 or take the night train 13hrs $83

Details of B:
Xi'an to Guilin flight ($100-$162) quickly get to Yangshuo by bus/car
Yangshuo 3-4 days
bus/car back to Guilin
Guilin to Kunmin flight ( $158/flight). quickly find Kunming to Dali bus/train
Dali - 1-2 days - train/bus to Lijian
Lijiang - 1-2 days.
fly Lijiang-Kunming. $74-183, depending on the day. Then fly Kunming - Shenzhen $162-$200

Are either of these rough itineraries realistic?
Thanks!