Despite the fact that they could not be there, but the living beings who were hiding at every corner of Mount Zhong could all feel the unstoppable power of the sword, which blocked out space and time where the two were battling.
Shen Lian's 'no beginning and no end' lost its flare under Chen
Beidou's supreme technique. Chen Beidou's technique served as a perfect illustration of power reaching an exceedingly high level, it could ignore the detail and profoundness of swordcraft. This was the reason Chen Beidou went on with the sacrificial ceremony despite knowing that the short increment in power had its flaws.
He chose power, and he believed in it.
Shen Lian had nowhere to run, and hence he did not. The sword will ignored the distance between time and space and it came like a tide. It first entered Shen Lian's heart. In his heart, it lit up a light, with the intention to show him the way in his desperation.