used in coordination with 我 wǒ or 他 tā to indicate multiple people or reciprocal actions

to chase; to pursue; to follow closely in order to catch up

used in combination with 你 nǐ to refer to people in general or reciprocal actions (e.g. 你来我往 nǐ​lái​wǒ​wǎng)

to chase; to pursue; to overtake or catch up with someone or something