Zong Shou spent roughly 5 days outside this Black Hole until the Soul Power in his body couldn't take it anymore and he woke up from his meditative state.
The attractive power of that black hole was increasing pretty much each moment. Even when he was a hundred million miles away, Zong Shou had a risk of dying at any moment.
If he was not careful and lost control of his body, he would be wrapped up into the absorption whirlpool and there would be no chance for him to struggle out of it.
Even during these 5 days, he could only fully focus on cultivation for half a day before retreating into the distance. As for the rest of the time, he was recovering the energy within his body.
In this type of environment, all sorts of laws, power of space, all of it was changing at every moment.
While he was comprehending the Heaven and Earth Daos here, he also needed to focus on forcefully suppressing and balancing the powers all around.