From the Chinese character for "ghost" (gui, 鬼, which actually encompasses a variety of spirits, demons, and zombies as well as ghosts) you might think that ghosts have large heads, bulging eyes, and hair sticking up straight.
人死必為鬼嗎？鬼都長得什麼樣子呢？由「鬼」字來看，鬼是個頭大、眼睛大，頭髮往上豎立的東西。