When they were still in medical school, the school had mobilized students to register for the bone marrow registry.
Since they were all studying medicine, the goal was to save lives, and they knew that extracting a small amount of bone marrow would not cause too much harm to the body.
So, as long as their health conditions were qualified, all the students went to register.
Gu Yi'an was not unwilling to register, but she was really afraid of pain.
To register for the bone marrow registry, only a blood draw was required.
This was just the initial screening. If someone had a preliminary match with her in the future, more detailed matching would be required.
But the problem was, she was really very afraid of pain.
The pain of the blood draw was within the range she could endure by gritting her teeth, but the pain of the bone marrow puncture was something she absolutely could not endure!