Haikou is bright at 6: 30 in spring and slowly turns to 6: 00 in summer. Over time, autumn turns to 6: 30, and it lights up at 7: 00 the next day. How time flies! It's winter again in a blink of an eye. Haikou has the longest winter night. It gets dark at 6 o'clock and doesn't open until 7 o'clock the next day. Does anyone have a problem with that? Let's talk about it