YSK the business of body donation for "science" can include things like the military blowing up your body for ballistics tests. It's also a for-profit business where bodies or body parts are sold by brokers who make money on the donation.
from /r/YouShouldKnow
YSK... ...爲 "科學 "而捐獻身體的業務包括諸如軍方炸燬你的身體進行彈道測試。這也是一種營利性業務，屍體或身體部位由經紀人出售，他們從捐贈中賺錢。