中国 ちゅうごく残留 ざんりゅう孤児 こじであれば
chūgokuzanryūkojideareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 中国残留孤児

1. If/when [they] were Chinese orphans left behind; If [they] had been Chinese orphans left behind

Ba Conditional