(Document B) According to an advertising poster, it shows that his concert could hold more than 8,000 seats, which cost $1.50 per person. era, and that other seats cost $0.75. The US dollar in the 1920s was more valuable than it is today. According to this result, Louis Armstrong was really popular and famous at that time. He also expressed his sadness in his songs, in "Lonesome Road", "Hotter Than That", "The Snake Rag", "On the Sunny Side of the Street", etc. For example, in the song “Hotter Than That”. That,” Louis Armstrong kept using and repeating the word, “Hotter, hotter, hotter; hotter than hell, hotter than hell, when the sun goes down, cold day in hell..." He points out that people's lives are bad while living in hell, and that people's mental activity is a a bit like a war. And, in another Louis Armstrong song: “On the Sunny Side of the Street.” The lyrics represent beautiful things, and "on the sunny side of the street" is repeated several times to express a peaceful and beautiful life. This is a solo for the band, and it requires the player to find their own ways of explaining jazz, while the player must put their whole heart into the music. Music comes from life, jazz as a musical form, it has a deep relationship with the social life of