Astronomy: There is a constellation, like a giant. What constellation is it? (Excerpted from Ba Jin's Stars)

The main body of the constellation consists of four bright stars, Betelgeuse and Betelgeuse, forming a quadrilateral. In the center of the quadrangle, there are three bright stars in a straight line, which should be a belt tied around the hunter's waist. In addition, under these three stars, there are three little stars, which are swords hanging on the belt. The whole image is like a brave hunter, with his head held high, which is very spectacular and has been noticed by people since ancient times.