What song did G.E.M. play with erhu in Xi 'an barbecue stall?

Russian folk songs: three cars covered with snow and ice, three cars galloping on the Volga River glacier ...-Speaking of Xi 'an snacks, many big stars must try them when they come to Xi 'an. Today, a video went viral in Weibo. In just ten minutes, the number of reposts and comments reached hundreds. This video recorded the interesting things that G.E.M., a famous Hong Kong star, met when he came to Xi 'an to eat snacks. G.E.M., a Hong Kong singer, became the hottest female star with her wonderful performance in I am a singer. The video that broke out in Weibo was shot by G.E.M. while eating snacks on the street in Xi. As can be seen from the video, the shooting time was in summer, and the location was at a barbecue stall in Huaxi Huamen, Xi 'an. At that time, G.E.M. and his friends should have just finished the barbecue, and Xi 'an's old yogurt was still on the table. After eating barbecue and yogurt, G.E.M. was obviously in a good mood and invited the old man who played erhu to entertain him. Hearing the beautiful melody of erhu, G.E.M. couldn't help but take out his mobile phone and dig out the lyrics, humming. Hong Kong singer: The Volga River in G.E.M. is covered with ice and snow, and three groups of cars are driving on the glacier. Who made you so sad? The driver asked him. Although G.E.M. is a Hong Kong singer and the accompaniment instrument erhu is simple, it is still difficult to hide the good voice of this new singer. G.E.M., a Hong Kong singer: Pears bloom all over the world, and veils float on the river. Katyusha stood on the steep shore and sang like a beautiful spring. Perhaps G.E.M.'s singing was so touching that he even attracted the attention of a person nearby. The man not only came to chat with her, but also invited her to eat mutton kebabs. Enthusiastic man: Do you want to eat meat? Roast mutton. Your plate is too small. G.E.M.: My plate is not small. My plate is no smaller than yours. The man also invited G.E.M. to take photos and dance. Although G.E.M. generously agreed to take a photo, he refused the invitation of disco dancing. G.E.M. bluntly said that he was only 17 years old and could not go to entertainment places. Many netizens joked that this person is generous enough, but this is because G.E.M. was not popular at that time, and now I'm afraid I can't squeeze in front of him. The scene of G.E.M. barbecuing and drinking yogurt on the roadside once again publicized Xi 'an's primary school.