For the sake of Xue Huan's future, Lu Lingfeng reluctantly sent Xue Huan to Chong Nian Temple to study literature and martial arts.Shi Duming, the governor of Yongyong, and Yuwen Mukai, the young craftsman of the general, accompanied the envoys from Japan, Silla, Kang and Bohai to visit the Tower of Towers. The envoys learned that there was a sky above the Tower of Heaven.The sage of the Tang Dynasty stood outside the sky and announced that on the night of the Mid-Autumn Festival a few days later, an illusion conference would be held to celebrate the completion of the towering tower.