Metropolis: Kill the Immortal Emperor? but I'm Really in the Period of Refining My Qi

[Master descends the mountain + Urban cultivation + Invincible flow + Nanny + Passionate killing + Not the Holy Mother] Nine years ago, on the first day that Ye Chen was brought to the mountain by his master, he reached the fourth level of the Qi refining stage. The master was ecstatic: I found a treasure! A year later, Ye Chen reached the thousandth level of the Qi Refining Stage. The master was depressed: There is something wrong with this apprentice! Nine years later, when Ye Chen reached the 9,000th level of the Qi Refining Stage, his master kicked Ye Chen on the butt: You monster, get down the mountain quickly, I can't teach you anymore!