1, sweeping the building, is a building knocking at the door from the roof residents to the first floor, or visiting an office building layer by layer.

2. Others, such as job seekers and resumes, can also be called building sweeping. Stars go to some corporate buildings, such as Sina, to promote activities, comfort employees, or experience work, which is also called "sweeping the building". Sweeping the floor is a common word in insurance marketing and credit card promotion.