Soviet music is generally created in the war period, the outbreak of the Patriotic War, the Soviet people developed the "Katyusha" rocket launcher, at the same time singing "Katyusha", it should be said that this song should be one of the few very uplifting, the "Night Outside Moscow" is said to be going to the front line of the Moscow soldiers to say goodbye to their loved ones song, so the sadness. Hawthorn Tree" was written in 1953, when the great leader "Stalin" died, the whole Soviet nation was in sadness, recalling the scene of Stalin leading the people to industrialization and the love story, "Birch Grove" is also a love story, I don't know why the Soviet Union's love is often very sad, maybe the fighting nation has to relieve itself through music, right? relieve themselves~~ Go Soviet Union!