开枪 (kāiqiāng) is a verb-object compound meaning 'to open fire,' 'to shoot,' or 'to fire a gun.' It is composed of 开 (to open/start) and 枪 (gun), and is commonly used in news reports and narratives involving firearms.
警察被迫向嫌疑人开枪了。
jǐngchá bèi pò xiàng xiányírén kāiqiāng le.
The police were forced to open fire on the suspect.
他听到有人在外面开枪。
tā tīngdào yǒu rén zài wàimiàn kāiqiāng.
He heard someone shooting outside.
士兵未经允许不得擅自开枪。
shìbīng wèi jīng yǔnxǔ bùdé shànzì kāiqiāng.
Soldiers are not allowed to fire without permission.