Lei Zhenzi and Ji Chang

Ji Chang was travelling to Chaoge with ninety-nine sons when his carriage came to Mount Yan and thunder and rain broke over it. When the rain stopped, the cry of an infant came from the hillside; Ji Chang had his men find the child beside a new grave and took him as his hundredth son.

Yunzhongzi came from Mount Zhongnan soon after, said the boy was destined to be his disciple, and carried him off under the name Lei Zhenzi. Seven years later Ji Chang was released from Chaoge, and beyond Lintong Pass he saw pursuers closing again. Yunzhongzi sent Lei Zhenzi down to save his father, first having him eat two immortal apricots from a mountain stream; Lei Zhenzi at once grew an indigo face, fangs and wings of wind and thunder, and broke a peak with his Golden Staff to frighten off Yin Pobai’s troops.

He carried Ji Chang on his shoulders, spread his wings over the five passes, and set him down only within the borders of Western Qi before taking his leave. Ji Chang died not long after returning to the city, and when Lei Zhenzi next came down the mountain it was to fight for the Western Qi his adoptive father had left behind.