(This issue is a happy design, but I am obsessed with the advantages and disadvantages of product design. Everyone should be funny and a little praise will be OK.)
The story goes like this:
"Well... To put it simply, it is that the customer wants to make a hair clipper, there is no requirement, it is just good-looking", to deal with such customers, there is no trace of waves in my heart. After work, he walked and looked down and thought, "What is there to do with a hair clipper?" Looking up, he saw a family selling ham. The ham baked on the stone smelled good. Try it. While eating the ham, he thought, "The ham can be combined with the stone, so why not the hair clipper?" Hmm... Nice ham!