Linghai

When Lan Yu was about to die, Zhu Yuanzhang concealed the truth and allowed Lan Yu to retreat. He ordered Lan Yu to search for the spiritual sea in the dream privately and obtain the immortal heart. Lan Yu kept his name anonymous and after unremitting efforts, he finally found the pass between the spiritual sea and the bronze gate and iron gate of the real world. When Zhu Yuanzhang, who was weak and dying, learned about it, he sent his army to obtain immortality here. However, he was threatened by an unknown force. At the last moment, Zhu Yuanzhang ordered to give up entering the Linghai Sea, sealed the place where the pass was buried, and executed all those who knew about it, including Lan Yu. When he was about to die, Lan Yu swallowed the key to the pass "Yiguang Ring" and let his illegitimate son swallow it in his belly to escape, and then followed the emperor's order to die... More than 600 years later, a frail and sickly boy was sleepwalking through Kyushu...