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Affected by strong cold air processes.
15:30 on December 15.
Inner Mongolia section of the Yellow River.
For the first time, the river was closed near the section of Sanhu Hekou Station.
However, when the earth exerts its "frozen power".
In Inner Mongolia, where it is more than minus 30 degrees Celsius.
A river that can't be frozen.
I am "steaming".
Why is that?
A contest between ice and fire
The river is called the Halaha River.
The total length is 399 km.
It is located in Arshan City, Xing'an League, Inner Mongolia.
There are more than 150 days of snow here every year.
The Halaha River originates in the Great Khingan Mountains.
Eventually flows into the Hulunbuir grassland.
And when it flows through the city of Arshan.
There is a stretch of almost 20 kilometers of the river.
It doesn't freeze all year round. 
Ice packs and snow packs on the water surface**From the web
This is mainly related to: Ice packs and snow packs that are above the water are related.
They are actually basalts full of pores.
Basalt is formed from magma.
Beneath the surface.
Scorching magma forms geothermal resources.
Meanwhile. Fissures that exist between the rocks in the ground.
It can not only be used as a channel for recharging groundwater.
It also allows heated groundwater to pass through the aquifer.
Straight to the surface. When these thermal waters pour into the river.
It will make this section of the river melt the snow and ice.
No freezing all year round. Therefore, it is also called the "ice-free river".
Where does the "fire" come from?
A few kilometers from the "ice-free river".
There is a volcano.
After the eruption of the crater, the water accumulates into a lake to form a heavenly pool.
Lava from the volcano clogs the Halaha River.
Xianhe Lake and Luming Lake have been formed
Rhododendron Lake, Lake Matsuba, etc.
Four dammed lakes.
As a result, there are abundant geothermal resources in the vicinity.
Schematic map of volcanoes in the Tohoku region**Sourced from National Geographic, China
In addition to the Arshan volcanic group.
It is still distributed in the Greater Khing'an Mountains area.
Changbai Mountain Tianchi Volcano,
Jingpo Lake volcanic group
There are many volcanic groups such as the Wudalianchi volcanic group.
Forming the area with the highest concentration of active volcanoes in China.
This means that Arshan's "ice-free river".
Not the only one. 
The ice-free river of the Hulunbergen River**From the web
The two white rivers of Changbai Mountain.
China's cold pole" Hulunbergen River.
There are "ice-free rivers".
There are many places that we have yet to discover.
There are magical "non-frozen rivers" flowing quietly.
Become animals in the dead of winter.
A rare source of water and a place to feed.
White Ice and Snow World
Accompanied by the appearance of the "unfrozen river".
There are also some natural wonders.
When the transpiration of the river meets the cooler branches on the shore.
It is even possible to skip the process of condensing from gaseous state to water droplets.
Directly condensed into a solid state.
The formation of rime hangs on the branches.
Wrap all the trees in their entirety.
Ice tray in the Xuer River section of the Great Khing'an Mountains**Source: Xinhua News Agency
Ice trays are also formed.
Also known as the "ice circle".
It is commonly found near icy rivers in extremely cold regions.
Broken ice floating on the river.
With the flowing water swept into the vortex.
Ice cubes that congeale into a circle.
Or a large number of ice cubes grinding off edges and corners in a rotating collision.
A circular ice tray is formed.
Together, these landscapes make up a world of ice and snow.
One can't help but marvel at the wonder of nature.
With the arrival of the snow season.
Ice and snow sports and tourism are also booming.
While having fun.
Everyone should be careful to prevent slipping.
Also pay attention to the warning signs.
Stay away from unstable ice surfaces, ice sculptures, and snow sculptures.
Beware of safety accidents such as falls and falls.
Also remember to wear sunglasses, gloves and other gear.
Wear non-slip shoes.
Take precautions to keep warm.
Prevents the reflection of sunlight from the snow from stinging your eyes.
Compiled by China Water Comprehensive Guangming Network, Planetary Research Institute, Xinhua News Agency, The Paper, etc.
Copywriting|Meng Jing.
Audit|Chen Rui.
Executive Producer|Fan Yizi.
Editor-in-charge|Luo Jingyue.
Proofreading|Prince Month.