Who was the son of September Pirates born with?

The cartoon "Stealing the Stars in September" does not specify who the son of September is, but only mentions that he is a Xiong Haizi who claims to be the son of September.

Everyone thought September was dead, but October said September was not dead, just asleep. After the world was rebuilt, Xiong Haizi, who claimed to be the son of September, told October and Liu Xing how to save their mother.

One year later, in 10, he was reborn with the efforts of Liu Xing and others. October and Ryukyu became children for this, and in order to make them recover, September became an international thief.

Introduction:

Stealing the Star in September is a popular domestic cartoon serialized by cartoonists. The authors are, Fan et al.

This work tells an adventure story related to Lance, a thousand-year-old country, and various mysterious organizations, which was triggered by thieves stealing jewels from the home of the protagonist Liu Xing in September. His works are praised as the perfect combination of magical modern martial arts style, fashionable light novels and aesthetic youth cartoons.