explosive pyrotechnic devices used for entertainment and display; also written as 焰火 yàn​huǒ

smoke and fire; specifically fire in the context of fire hazards or safety regulations

stove fire and cooking smoke; refers to cooked food or the human world of eating and survival

incense and candles used in ancestor worship; refers to descendants or a family line

(literary) beacon fires used for signaling; refers to the flames and smoke of war

(literary) signs of human presence such as cooking smoke; populated areas