How do you get a silver shovel on Animal Crossing

Each time you go to the city, run over to the orange cones on the far right near the road. Sometimes the bus knocks them over, leaving an entrance for you to go to Resetti's Surveillance Center . If it's your first time, he will give you a silver shovel and tell you to scram. But what's much easier and better, if you want a golden shovel, just make sure you have a shovel. A normal one. Basic. Buy another normal, basic shovel and bury it with your normal basic shovel. The next day, dig it up and it should be golden. Now you can plant money trees!! :D :D :D