yé ye / nián qīng / shí / cān jiā / guò / tiě dào bīng / céng / zài / shān qū / xiū jiàn / tiě lù

爷爷年轻时参加过铁道兵，曾在山区修建铁路。

When he was young, my grandfather served in the railway troops and helped build railways in the mountains.