Where can I find the key in the abandoned house next to the Taoist temple in Honglian town?

First enter the abandoned house next to the Taoist temple in Honglian town and come to the stone statue to talk. Choose as shown in the figure below:

Second, turn left after talking to the stone statue. There is a staircase that can go up to the second floor, as shown in the figure below:

You will find another stone statue when you go upstairs. Click the dialog box again and select Yes, as shown in the following figure:

4. Go down after the conversation. You come to a huge underground hole and jump down from here, as shown in the following figure:

5. After jumping down, you can go to the basement floor, and you can get the key on the left side of the table. This is the way to find the key in the abandoned house.