bitcoin cash vs xrp,Everyone knows McDonald's. McDonald's was originally a hamburger restaurant opened by the McDonald's brothers in California, USA. The business was very good, but it did not expand the chain. Later, Crocker, who was selling ice cream machines, discovered that the machine ordered by the McDonald's brothers' hamburger restaurant Far more than other burger restaurants, after some investigation, Kroc found that the McDonald brothers had made an innovation, decomposed the hamburger production process completed in one station into assembly line operations, which is the same as Foxconn's assembly line, so small. The innovation may not be seen by users, but the user's waiting time is shortened, and the business is very good, so more ice cream is sold accordingly.