What did Xu Shisan do to Nannan six years ago?

As follows:

When Jiang Nannan was fourteen, his mother was seriously ill because her family was poor. Xuan Ming sent Xuanwu Shen Dan to treat him badly, so he had to have sex with Xu and let Wu Soul evolve.

But I still didn't like it during the ceremony, so Xu stopped, leaving only half of the Xuanwu shield. Because of this, there is a gap between the two.

Plot:

There is no magic, no quarrelling, no martial arts, only a martial spirit. Ten thousand years after the establishment of Tangmen, Tangmen declined. A generation of pride was born. Can the new generation of Shrek Seven Monsters revive the Tang Clan and compose a song of peerless Tang Clan?

A million-year-old soul beast, a necromancer who mastered the sun, moon and stars, led to the decline of the brand-new soul-guiding system in Tangmen. All the magic will be revealed one by one

Whether hidden weapons in Tangmen can regain its glory and whether Tangmen can regain its glory depends on the peerless Tangmen!