Sanyuan fresh milk is delivered every day, and the service attitude is really poor. When I ordered milk, I said I could deliver it every morning and evening. Now I can only deliver it in the morning without any notice. Asked why they can only deliver it once, their answer is that it will increase their labor cost twice, and I also took their milkman with me.

Milk is one of the oldest natural drinks, known as "white blood", and its importance to human body can be imagined.

As the name implies, milk is expressed from a cow. In different countries, milk has different grades. Milk is rich in minerals, calcium, phosphorus, iron, zinc, copper, manganese and molybdenum. The most rare thing is that milk is the best source of calcium for human body, and the ratio of calcium to phosphorus is very suitable, which is beneficial to the absorption of calcium.

There are at least 100 complex species, and the main components are water, fat, phospholipids, protein, lactose and inorganic salts.