The noun 人群 (rénqún) means "crowd" or "group of people." It combines 人 (person) and 群 (group/flock) to describe a gathering of many people in one place. It is commonly used in news reports describing public events, protests, or busy locations.
广场上聚集了一大群人群在看表演。
guǎngchǎng shàng jùjí le yī dà qún rénqún zài kàn biǎoyǎn.
A large crowd gathered in the square to watch a performance.
人群中突然有人大喊了一声。
rénqún zhōng tūrán yǒu rén dà hǎn le yī shēng.
Someone in the crowd suddenly shouted loudly.
他在人群里找了半天,终于看到了朋友。
tā zài rénqún lǐ zhǎo le bàntiān, zhōngyú kàndào le péngyou.
He searched through the crowd for a long time and finally spotted his friend.