Àn / zhào / jiù / sú / tā / jū / sāng / qī / jiān / bù / néng / cān / jiā / xǐ / qìng / huó / dòng

按照旧俗，他居丧期间不能参加喜庆活动。

According to the old custom, he could not attend celebrations during the mourning period.