The auspicious words to knock on the wall when the renovation project starts are: The project starts auspiciously, and you will be promoted step by step. The project will start auspiciously, and every step will be smooth. Generally, when renovating a house, a good day will be chosen for the ground-breaking ceremony. After the firecrackers are set off, the ground-breaking ceremony will begin. This is to use a hammer to knock three times to indicate that the ground-breaking ceremony will begin and that everything will go smoothly.