CLEAN: 32 dead after Chinese bullet trains collide

The transcript discusses efforts to ensure a steady supply of rescue blood. It highlights the transportation of blood from Lishui City to Window City and the voluntary participation of over 300 people, including teenagers and young adults, in donating blood at a center in Wenzhou to aid the injured.

Describe the scene of the rescue work mentioned in the text.

What is the significance of the blood donation for the injured?