He’s building an army.

A Chinese billionaire who allegedly fathered more than 100 US-born children through surrogacy agencies reportedly hopes the kiddies will one day marry Elon Musk’s children and create a sprawling family dynasty.

Xu Bo, a 48-year-old wealthy recluse who founded the online gaming company Duoyi, calls himself “China’s first father” and has been hell-bent on siring at least “50 high-quality sons,” according to social-media posts verified as his by the Wall Street Journal .

His company has posted on social media that Xu has produced more than 100 kids through US surrogacy, the outlet said.

The story has exploded on Chinese social media after Xu’s ex-girlfriend posted that he had fathered more than 300 children, 11 of which she said she raised for years.

“That number

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