What are the geographical knowledge points of Heilongjiang in "Aerial Photography of China"?

The geographical knowledge points of Heilongjiang in "Aerial Photography of China" are as follows:

1. Geographical location: Heilongjiang Province is located at the northernmost point of China's territory, and the two plains of Heilongjiang are China's largest granaries.

2. Kuerbin Hydropower Station: It discharges hot water in winter. The surrounding rivers do not freeze all year round, and a large amount of water vapor accumulates in the air. At night, the temperature drops sharply, and the moist air blows across the earth. When they are cold, they form ice and gather on the surface of the branches, forming the spectacle of rime. It has a long flowering period of four months.

3. Skiing: After a morning of sunshine, the snow becomes slightly sticky in the afternoon, which helps increase friction and makes it easier for beginners to control skis.

4. South: Xuexiang is the snowiest place in China. There are more than 200 snowy days in a year, and the deepest snow exceeds two meters. Because of its unique snowfall, it has become a popular tourist attraction.

5. Black Dragon Pool: There is unexpected warmth under the deep water of the 60-meter-deep Black Dragon Pool. In winter here, the temperature is below minus 20 degrees Celsius, but the temperature under the water remains above 10 degrees Celsius all year round.