C107 Light Extraction of Xuzhou

It was night. On the north wall of the city, a dozen Xuzhou soldiers were guarding the city, occasionally looking out of the city. Several Xuzhou soldiers were napping on the city wall, leaning against it as if they were dishonorably doing their duty. A few figures quietly climbed up to the city wall; their agility was like that of a cat's, and they didn't make any sound as they walked