上前
shàng qián
to advance; to step forward
up/toward (上) + front (前) = step forward into what lies ahead
上 carries the sense of moving upward or toward something, and 前 points to what lies ahead. Together they paint the image of stepping up and into the space in front of you.
他走上前，帮那位老人拿行李。
tā zǒu shàng qián, bāng nà wèi lǎo rén ná xíngli。
He stepped forward to help that old person carry their luggage.
看到有人受伤，她勇敢地上前询问情况。
kàn dào yǒu rén shòu shāng, tā yǒnggǎn de shàng qián xúnwèn qíngkuàng。
Seeing someone injured, she bravely stepped forward to ask about the situation.