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：通過寄養收養通常對家庭沒有成本，包括課程/證書/背景調查，以確保孩子的安全和父母的成功。