The autumn night sky in the Northern Hemisphere is somewhat desolate, with only the Autumn Quadrangle overhead, Fomalhaut on the southern horizon. As the temperature drops, the stars seem to become dimmer and more dismal. The teacher once taught Ban Xia to recognize those famous constellations; Andromeda and Pegasus together form the Autumn Quadrangle, with Fomalhaut in the autumn southern triangle. But she can't remember any more than that, nor can she find them. It's not like summer when the air is clear and crisp on a midsummer night, and one feels as if they can see endlessly into the distance. The famous Summer Triangle glistens overhead, and there were meteor showers in summer; the Perseus meteor showers in August are one of the biggest meteor showers of the year. The teacher said that in this era there are no more fireworks, but it's suitable for watching meteors.
"Have you seen fireworks?" Ban Xia asked.
"I have," Bai Yang answered, "Who hasn't seen fireworks?"
