About 40-50 north latitude, there are many high-quality pastures all over the world. The golden milk source belt in the northern hemisphere includes Ireland, Holland, Normandy, northern Germany, Mongolia, China, Inner Mongolia, northern Japan and Minnesota from west to east. The high-quality milk sources produced in these areas occupy most of the market share of the world's high-end dairy market.

Compared with the large-scale high yield in the northern hemisphere, the golden milk source belt in the southern hemisphere has less output and purer quality. Because the world's industries are concentrated in the northern hemisphere, which brings all kinds of pollution and epidemic problems, but the southern hemisphere is basically surrounded by oceans at 40-50 south latitude, enjoying fresh monsoon and abundant rainfall. Located in the golden milk source belt in the southern hemisphere, there are only three sparsely populated areas: South Australia, New Zealand and Argentine pampas Grassland, and the output and quality of dairy products are even more scarce.