biān jìng xún luó shí / shuāng fāng cā qiāng zǒu huǒ / yǐn fā le yī chǎng chōng tū

边境巡逻时，双方擦枪走火，引发了一场冲突。

While patrolling the border, the two sides accidentally exchanged fire and sparked a conflict.