This place of peace of mind is my hometown. For the first time, the night in Bianjing is gently lit up by the light that does not belong to the stars and the moon. On the top of the imperial city, on the highest observatory of the Gewuyuan, dozens of first-generation incandescent lamps emit a stable and warm halo, clearly outlining the exquisite eaves and brackets, and illuminating the countless faces looking up in wonder and awe in the square below...