Why is Harbin called Ice City?

Harbin is located between east longitude125 42' ~13010' and north latitude 44 04' ~ 46 40', in the northeast of China and the south of Heilongjiang province.

Harbin's climate belongs to the mid-temperate continental monsoon climate, with long winters and short summers. The average annual precipitation is 569. 1mm, mainly from June to September, and summer accounts for 60% of the annual precipitation. The four seasons are distinct, and the average temperature in winter is about-19 degrees. The average temperature in summer and July is about 23 degrees.

Because of its unique geographical location! So it's called Ice City! Mace is afraid of injury.