2.B

3. The bronze statue of Sun Yat-sen at Zhongshan Gate, Hanzhong Gate, Zhonghua Gate, Central Gate and Xinjiekou (east, west, north and south)

4. Ming Tombs (the historical starting point and symbol of the only unified centralized dynasty in the Six Dynasties, known as the ancient capital of the Six Dynasties).

5. Sun Yat-sen mausoleum

6. Number

7. The bronze statue of Sun Yat-sen in Xinjiekou, from which the place name and orientation of Nanjing are derived. Taking the bronze statue as the coordinate, the east, west, north and south of Nanjing can be seen at a glance.

8. Beijing (clear coordinates, neat and intuitive)

9. Yes, but landmarks should jump out of the box of high-rise buildings or pure commercial circles and have more cultural significance and historical connotation. Instead of building a pure business circle, it is better to connect with historical sites or museums, which has both commercial significance and can enhance people's sense of city honor, and is more unique and has a sense of local cultural characteristics.