gǔdài / biānfáng jūn / fāxiàn / díqíng / hòu / chángcháng / diǎnrán / lángyān / chuándì / jǐngbào

古代边防军发现敌情后，常常点燃狼烟传递警报。

After detecting enemy activity, ancient border troops often lit smoke signals to send an alert.