àn zhào / gǔ dài / fǎ lǜ / jiā shǔ / bì xū / zài / xiàn dìng / shí jiān / nèi / jiāo fù / shú jià / cái néng / huàn huí / bèi fú / de / rén zhì

按照古代法律，家属必须在限定时间内交付赎价，才能换回被俘的人质。

Under ancient law, the family had to pay the ransom within the specified time to get the captured hostage back.