Xue Ying, a capsule firefly, comes from which allusion and is related to which character?

Capsule Firefly is from Biography of Che Yin in the Book of Jin, which is related to Che Yin. He said that he was diligent, his family was poor, and there was no oil to light a lamp. "Xia Yue practices taking photos with dozens of fireflies in the space capsule" and can read books day and night. Xue Ying, a native of A Record of Sun Shi, is related to Sun Kang. That is to say, he is from a poor family, but he "often learns from Xue Ying". They all say that they study hard.