At the same time, it should be noted that the seven stars in the seven-star Julian are not seven nights, but specifically refer to the sun, moon, gold, wood, water, fire and earth. On May 5, 2000, this kind of "planet" comes once every 30 years, which is rare in a person's life, but it is frequent and not rare on a large time scale. The last time happened on February 5 1962, and the next time will wait until September 9, 2040. However, there is a folk superstition that seven stars in a row is a good omen, which is really rare.