What is an investment bank

A newcomer to an investment bank asked his senior, "What is an investment bank?" The senior smiled and handed him some seemingly stale fruits and asked, "How do you plan to sell these fruits?" The newcomer thought for a while and replied, "I can sell them at a discount according to the market price." The senior shook his head, then picked up a fruit knife, peeled and cut the fruits into pieces, carefully made them into a beautiful fruit platter, and said, "In this way, we can sell them at a higher price, maybe even dozens of times the original price." This is the wisdom of investment banks, maximizing asset value through innovation and repackaging.