What's so funny about this?

two of them had just walked into the small garden of the hospital when they bumped into Lin Ruochu, who had come down specially to wait for Fu Mokhan.Seeing Fu Mochen, Lin Ruochu's face flashed with a...a gentle rain overnight, had formed small puddles in the deeper areas and muddy pools in the shallower ones. Every step left a patch of mud clinging to one's shoe soles.Lin Jin's pair of cotton slippe...