Katyusha, you are frivolous when you shout. Katyusha is a nickname for some Russian girls. This is similar to some nicknames of "Mingming", "Lili" and "Dog Egg" in China, but in Russia, these nicknames are relatively private for their girls, and outsiders can't call them that, so some tourists shout like this without knowing the truth, which will arouse their disgust.
This is a once popular song, and it is also a kind of ammunition in Russia. Their name is "Katyusha". Their reaction to this point is good. If it is explained in advance that they are talking about songs or cannons, they can still understand them and will answer any questions they ask.
The word "Katyusha" is regarded as one of the cultural symbols of Russia. What does this mean? To put it simply, just as many foreigners mention China, they immediately think of "Panda", "Kung Fu" and "Great Wall", which are the cultural symbols of our country. Katyusha is a cultural symbol of Russia. Many tourists don't know this, so when greeting Russians, they will tell them "Katyusha" in a teasing tone. This is very impolite. They will think that we don't respect them, and naturally we won't have a good face.
So every place has its own unique culture, which is the charm of different nationalities and regions and their beliefs. What we need to do is to respect these cultures, understand them and look at the local history properly before traveling to a place, which will not only help us find more beautiful places when traveling, but also make local residents more enthusiastic about us.