I'm the Master of the Yellow Springs

Ordinary office worker Wu Lang crosses over to the prehistoric era in the immortal game Yellow Springs Demon Sect.
He is in the middle of the First Yellow Spring Demon Sect, and in order to survive, he can only pretend to be a sage, using the sand sculpture funny kung fu that players in the latter days have opened up, teaching and educating all beings, and constantly accepting disciples, teaching the world kung fu, and opening up the era for the world.
Thus, a mudslide was set off in the Immortal Cultivation world.