At night, there are seven or eight stars piled together in the east, that is, what are the stars or constellations called?

Hello, it's called the Pleiades. Pleiades cluster (M45) is one of the open clusters. In the northern hemisphere, it is a large and bright open cluster in the west, located in Taurus, which can be seen with the naked eye in the clear night sky. Its bright star lies in the Pleiades, hence its name. Messier's catalog number is M45, and there are usually six or seven bright stars visible to the naked eye, so it is often called Seven Sisters Cluster. It is one of the brightest open clusters recently. The Pleiades cluster contains more than 3,000 stars, with a width of about 13 light years, a distance of 128 parsec (4 17 light years) and a diameter of about 4 parsec.