Lu Hanyu knew very well that he had traveled through time, and that he had traveled through time together with the Jiansan System.
Why are you so sure, you ask?
Haha, anyone who was controlling Tang Sect's trumpet flying Qinggong with Zha Jiansan one second and found himself falling from the sky the next second would know that he has traveled through time! Anyone who falls to the ground with a "chirp" sound and is smashed into a meat pie but does not lose consciousness, but has a countdown of [return to camp to resurrect] and a [resurrection in place] option before his eyes will know that he has obtained the legendary golden thigh - the Three Swords System!
PS: This is a trap. The update date is unknown. The first chapter has been released. I don't know when the second chapter will be released. ORZ