Zhou Chun spent nearly a year by the Cold Spring Ice Cave to subdue the Skyfrost Cold Bee.
When the great battle with the Jiang Family occurred, the Silver Lightning Python Baibai had employed the "Ancestral Resurrection" secret technique, which led to a period of weakness. By the time it returned to the family, it had almost recovered.
Hence, when Zhou Chun was subduing the Skyfrost Cold Bee, he did not take his Spirit Pets with him. Instead, he fed Baibai the Millennium Thunderlight Grass, which he had purchased for a hefty sum, allowing it to sleep and rest at Jiufeng Ridge.
Now it seems that the Millennium Thunderlight Grass was indeed worth the heavy price Zhou Chun paid, as it successfully caused an anomaly in the Thunder Python bloodline within Baibai.
