YSK: Adoption through foster care usually has no cost for the family and includes classes/certifications/background checks to make sure the child will be safe and parents set up for success.
from /r/YouShouldKnow
YSK：通过寄养收养通常对家庭没有成本，包括课程/证书/背景调查，以确保孩子的安全和父母的成功。