The Swordmaster of Lihen and the others brought Zhu Kong and all those with him back to Emperor Xia's Realm. Zhu Kong and the two other Holiness of Nirvanas suffered severe damage. They lost their combat capacity, for the time being, making it impossible for them to play any tricks during the journey.
When they reached Emperor Xia's Realm, their tribesmen were being ruled by those from the Nanli tribe and the other two tribes, which made it even more unlikely for them to do anything.
Worse still, there were also many from the Nanli tribe, the Beili tribe, and the Vermillion Bird tribe heading towards Emperor Xia's Realm. With deterrents being everywhere, none would have dared to harbor any thoughts of doing anything nasty. They simply did as they were told.