C394
"I heard that Lou Yu went to the Comprehension Tower for a month, and when he came out, he rose from the early stage of the Profound Rank to the Mid Profound Rank." Gongsun Ming was a little jealous.
Once the star master reached the Profound Ranking, it would be difficult to advance any further. There were many people who were stuck at the early stage of the Profound Ranking for dozens of years