Ice wine is known as the "liquid gold in wine", with high nutritional value. The definition of ice wine is: ice wine is a kind of sweet 

wine. Below - 8 ℃, ice wine is made by naturally frozen grapes on grapevine. When grapes are frozen into solid state, a small amount of 

concentrated grape juice is obtained by picking and pressing. The grape juice is slowly fermented and then aged for several months. The 

grapes used for making ice wine are picked and brewed at - 8 ℃ after the winter snow.

When the world's youth is gone, the wind and frost come, and the grape leaves that have worked hard for a year are gradually returning to 

their roots. The grapes that still grow on vine are beginning to crave for the essence of sunlight, air, soil, rain, and even more than 

ten miles away. They will eventually dehydrate and concentrate into extremely nutritious ice grape juice.

In December, grape growers will closely observe the weather conditions. When the temperature is below - 8 ℃, they will start picking them 

in the middle of the night. Most wineries will use manual picking. The ice grapes picked are hard and sound like marble when they are 

poured into the collection bucket. It stops at 8:00 a.m. because the temperature starts to pick up during the day and the grapes on the 

vine will soften.

After picking, the ice grape will be squeezed immediately, that is, pressing with ice. The large extruder used for extrusion must be set 

outdoors, because the indoor temperature is high, the ice grapes will thaw. And the extrusion temperature should be in line with the ice 

wine production specifications, that is, the external temperature should be lower than - 8 ℃. The juice of grapes for making ordinary 

wine flows out rapidly during extrusion, while the juice of ice grape slowly flows out bit by bit. It takes 4-6 hours to squeeze at a 

time. Only about half a kilogram of juice can be squeezed out from 15-50 kg grape to make a bottle of 375 ml ice wine. In other words, a 

drop of ice wine (1ml ice wine) needs 10 ice grapes, and a bottle of 375 ml ice wine needs 3750 ice grapes.

Ice wine is mainly concentrated in Northeast China. Yalu River Valley is located in Ji'an City, which is "small Jiangnan of Jilin 

Province". It has a humid temperate monsoon climate. It is cold in winter and warm in summer. Because it is located at 41 ° n, due to the 

water source of Baishan green water and the birth of high organic soil, the unique East Asian Native ice grape grows here. The soil here 

has good permeability and rich minerals, which is very suitable for grape growth. At the same time, the pollution-free ecological 

environment also laid the foundation for the production of high-quality ice grape. The superior climate, soil and ecological conditions 

make the Yalu River Valley in Ji'an become the dominant grape producing area in China.