Wet the bed with fire. Next, play with water.

Fire wet bed, water wet bed. "Playing with fire and wetting the kang" is a folk proverb in Northeast China, which is mainly a sermon for parents to educate their children not to play with fire. For children, if they play with fire at home during the day and fall asleep at night, they will wet the kang and keep you awake, and adults will spank you. If you play with water, there will be water on your clothes and your body will get wet. This answer is for reference only. Don't be blindly superstitious.