Subject + 往 + Direction / Place + Verb
The preposition 往 (wǎng) means "towards" or "in the direction of" and indicates the direction of movement. It is placed before a direction or location word to show where someone is heading. For example, 往前走 means "walk forward."
往前走两百米就能看到地铁站了。
Wǎng qián zǒu liǎngbǎi mǐ jiù néng kàndào dìtiězhàn le.
Walk forward two hundred meters and you'll see the subway station.
你往左拐,超市就在那儿。
Nǐ wǎng zuǒ guǎi, chāoshì jiù zài nàr.
Turn left, and the supermarket is right there.
他往窗外看了一眼,天已经黑了。
Tā wǎng chuāngwài kàn le yī yǎn, tiān yǐjīng hēi le.
He glanced out the window; it was already dark.