Does Yu-Ching Fei really sleep during the day all the year round?

Life, Yu-Ching Fei is also very low-key, from fame to now, almost no gossip. 63 years old, he is still single. Moreover, Yu-Ching Fei has a habit that puzzles the audience. When attending a variety show, Yu-Ching Fei blew himself up: he had a habit contrary to ordinary people, that is, he never slept at night and slept during the day. And this habit, Yu-Ching Fei has maintained for a long time.