The Luo Clan's Blessed Realm is by no means small. Although it can't be compared to special existences like the Kunwu Realm, the Luo Clan, maintaining a population around ten thousand, has vast space for activities and ample Spiritual Energy for cultivation within it.
Therefore, even those living around the central building of the Luo Clan, Ruoyouchi, have their own residences, and they do not disturb each other. This is precisely why Su Chengyu dared to go to Luo Zongyuan's home.
Outside the mansion, facing the expected protective Formation, Su Chengyu did not act rashly.
Forcing his way through the Formation would clearly be unwise. To sneak in quietly, he would have to rely on Luo Nanping.
Since there exists a Token in Luo Ling'er's house that ensures unhindered passage, it is highly likely that there is something similar within Luo Zongyuan's residence as well.