It's very tiring to install it downstairs. Some people who don't have an elevator or can't get into it need to struggle by themselves, but they need to be installed. A day passed before they could make forks. If the landlord wants to do it, he must do it well and remember to bring his business card. Only when the pre-service is done can he become popular. You can hire someone to do it later. As for the specific operation, it depends on your personal ability. I hope I can adopt it myself.