Chinese ghost culture is rich and ancient. The Ghost Festival (中元节/鬼节) falls on the 15th of the 7th lunar month, when ghosts are believed to roam freely. People burn paper money and offerings for the dead.
usage
鬼 as a suffix describes people with a particular trait (usually negative): 酒鬼 (drunkard), 烟鬼 (chain smoker), 懒鬼 (lazybones), 小气鬼 (cheapskate), 胆小鬼 (coward). But 小鬼 (little rascal) can be affectionate.
usage
鬼话 (guǐhuà) = nonsense/lies. 鬼子 (guǐzi) = foreign devil (derogatory, historically for Japanese invaders). 魔鬼 (móguǐ) = demon/devil.