C400 The Black Cat Outside the Door

The sudden knocking on the door gave me a shock. The knocking was irregular, and the sound was very loud. It made me feel uncomfortable when I heard it.

Auntie Zhang was also in charge of opening the door at Zhao Bing's house. When she heard the knocking sound, she immediately stood up and wanted to open the door. I did not want unrelated people to come so I said to Auntie Zhang