I never really understood this. Very few people live alone here, yet many supermarkets and delivery services offer 一人 (yī rén), one person amounts of ingredients for dishes.
Right now, is hotpot season and so they are selling single portions of suitable ingredients like this.
Paper thin beef slices in rolls, meat balls and green vegetable.
That can be supplemented by this selection of seasonal produce.
They do not charge a premium for the service.