Yu the Great (yu) is painting in the space station's bathroom (Ø4). First she paints backgrounds with a decorator's brush (聿), then applies some details using a crayon (肀), and finally she discharges a capacitor (二) on the canvas for special effects.
Xu Xian hurt himself and needs to get a blood transfusion in the elevator's bathroom. He found a petal leaf as donor, which is bleeding droplets into a bowl; Xu Xian gets the blood from the bowl as infusion using some tubes.