The Liu Household's first round of development and construction on Peach Blossom Island lasted three years before it was largely complete. Two small-scale beast tides occurred during that time, but the Liu Household wiped them out or drove them away.
With two Nascent Soul True Lords, Liu Changxu and Yang Qingxue, stationed there, beast tides of ordinary size could no longer threaten Peach Blossom Island.
In fact, fourth-tier Demon Kings had secretly instigated both small-scale beast tides to test the strength of Peach Blossom Island's new owners.
But after Liu Changxu and Yang Qingxue appeared and wiped out or scattered the hordes of sea monsters attacking Peach Blossom Island, the fourth-tier Demon Kings lurking in the shadows furled their banners and silenced their drums, quietly retreating.
To fourth-tier Demon Kings whose intelligence rivaled that of adult humans, an island guarded by two human Nascent Soul cultivators was not something they could casually provoke.
Even if they had the strength to defeat the two Human Race Nascent Soul cultivators, they would not do so, for fear of being injured in battle.
If they were injured fighting the Human Race, other fourth-tier sea monsters hostile to them might strike.
In some respects, the conflicts between the various sea monster tribes were even fiercer and more tense than their relations with the Human Race.
Only during large-scale beast tides, with a fifth-tier Sea Demon Emperor above them keeping them in check, would relations between the Sea Monster Race tribes ease somewhat as they joined forces against their great enemy, the Human Race.
To some extent, the size of a beast tide was closely tied to the strength of the high-tier sea monsters driving it.
Generally speaking, a fourth-tier Demon King could only launch a small-scale beast tide. Only when many fourth-tier Demon Kings