Yang Qing spent the whole night by the rattan chair lost in his thoughts and dreading his future life as another exploited worker in the cog known as the Order that he didn't notice until the morning rays hit him that the night had passed.
Luckily once cultivators reach the core formation realm they can live without taking shower since most of their body's impurities will have completely been cleansed by then and the mechanisms in which their bodies operates also completely transform at that point like no longer having the need to eat too as they can subsist on spiritual qi alone.