1700 dormitory balcony as shown in figure 2. It is old, but fortunately the dormitory is affordable!
The balcony of the dormitory in 2000 seems to be the same as that of 1700, but the dormitory in 2000 has been upgraded, which is simply the most affordable dormitory.
The balcony of the dormitory of 2800 and above is shown in Figure 4. Oh, it's brand-new and shiny