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located in the northeast of China.

the changbai mountains

is named after its iconic scenery(iconic形象的）

of being perpetually white almost all year long

these mountains were formed around 2.77 million years ago

after volcano eruptions due to the movement of the earth crust

at the top of the main mountain there is a crater lake with an altitude of 2100meters

it is called tian chi in chinese

literally meaning heaven lake

it latest eruption happened around 300years ago

tianchi is the lagest crater lake in china

and it is deepest mountain lake

around the world as well.

the average depth of water is 204 meters

it has stored over 2billion of freshwater

which is able to supply the population

in beijing downtown for 22 months

the winter lasts for 9 months in the changbai mountains

thus,the crest of mountain is covered by snow most of the time

the depth of the snow is 50centimeters on average.

it is extremely difficult

to visit the mountain during the winter

lake tianchi only melts in mid-july

due to the cold weather and the water in the lake is flowing for only 30 days every year

it is always misty and cloudy .according to the locals,

people could only see the most imposing scenery here

if they have a special mysterious connection with this magical mountain