While the short-term investment in the use of electronic labels may seem huge, it is a one-off investment. It is easy to operate, reduces the labor cost, and basically does not need late reinvestment. In the long run, the overall cost is low, but the seemingly low input paper price tag needs a lot of labor and price tag paper. The cost increases gradually with the passage of time, the hidden cost is very huge, and the domestic labor cost will be higher and higher in the future!