When Donna came out with Emily, it was completely dark. The female attendant carried a red lantern and hung it on the door. Then she turned back to close the door.
Just as the three of them were about to head back, they saw the next door open. Several people were walking in and out with a bucket of water in their hands.
Emily looked in curiously and saw a group of people pouring water into a lotus pond in the courtyard. Clark and Tyson of course remembered Emily. When they came out with an empty bucket, Clark said to Emily, "Our young master feels that the water in the pond is dirty, so he asked us to change the water."