Core of the Promethium-Radium Crystal.

Summary

The story follows Shen Ling Hao, who is questioned by Yu and Old Wang but reveals nothing about the crystal source. After school, he and Lei Yu Xuan search for the Waste Treasure Research Institute, eventually finding it behind a convenience store. They meet Chu Hao, who explains that they are part of an organization called the Harvesters, dedicated to protecting the Praseodymium-Radium Crystal Source from outer space. Chu Hao shares the tragic history of his master and senior brother, who died while guarding the crystal. Shen Ling Hao returns the crystal to Chu Hao, realizing their fateful connection.

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