人马 (rénmǎ) is a noun that can mean 'troops,' 'personnel,' or refer to the constellation Sagittarius (人马座). In everyday usage, it often describes a group of people or forces. In astronomy, 人马座 refers to the zodiac sign or constellation Sagittarius.
他们公司最近招了一批新人马。
Tāmen gōngsī zuìjìn zhāo le yī pī xīn rénmǎ.
Their company recently recruited a batch of new staff.
我是人马座的,你呢?
Wǒ shì Rénmǎzuò de, nǐ ne?
I'm a Sagittarius, what about you?
这次行动出动了大量人马。
Zhè cì xíngdòng chūdòng le dàliàng rénmǎ.
A large number of troops were mobilized for this operation.