You add some to the milk, I put sweet additives into expired mantou, he puts additives into the food he feeds his pigs, oil, crab, rice, duck eggs… even if the milk manufacturers don’t drink milk, they eat mantou.
Tú añades algo a la leche, yo pongo aditivos dulces en un mantou caducado, él pone aditivos en el pienso de los cerdos, aceite, cangrejo, arroz, huevos de pato... incluso si los productores de leche no beben leche, comen mantou.