Yili's pure milk with high calcium and low fat is not exactly the same as ordinary Yili pure milk. Although they all contain the main nutrients in milk, high-calcium and low-fat milk will be specially added with calcium and reduce the fat content in the production process to meet the health needs of specific people. Ordinary pure milk does not supplement calcium and does not reduce fat content.

As for why high-calcium and low-fat milk on Taobao is cheaper than ordinary milk, this may be related to the following factors:

1. Different production costs: The production process of high-calcium and low-fat milk may be more complicated than ordinary milk, requiring more production steps and higher-quality raw materials, so the production cost may be higher. However, this does not mean that high-calcium and low-fat milk must be more expensive than ordinary milk.

2. Market demand: High-calcium and low-fat milk is aimed at a specific group of people, and may not be as widely needed as ordinary milk. Therefore, manufacturers may stimulate market demand and promote sales by lowering prices.

3. Competitive pressure: On the e-commerce platform, price competition may be fierce. If one merchant lowers the price in order to win more market share, other merchants may be forced to follow suit. This may lead to the price of high calcium and low fat milk being cheaper than ordinary milk.

It should be noted that the price does not necessarily reflect the quality or nutritional value of the product. When buying milk, you should choose the right product according to your own needs and preferences, not just the price.