I will be taking train from Guangzhou South to Yangshuo.

Hi. I am planning for a 2D1N trip from Guangzhou to YS. Will be staying overnight in YS. I would like to know a few things here:
a. How to plan my time in YS if I only have 2D1N there? Would like to watch Impression show at night.
b. Upon arriving in YS, how do I travel to the town of YS? Should I stay in XingPingZhen or YS?
Appreciate some idea, thanks!