Beginners generally don&;t know how to sweep the strings, and the original song is to sweep the strings .. But in the key of C, you don&;t have to be afraid to press the relatively simple song horizontally, so it is also ruled out that the rhythm of two songs is not easy to master. It&;s only dusk .. Except for beginners, it&;s still 44 beats. old boys&;s tune is very high and difficult to sing. There are many 16-minute notes in the rhythm of lonely sandbar&;s cold singing, so it&;s not bad to take them with a small horizontal press. The lilacs downstairs are not suitable for entry in spring. Dusk and old boys are ok, but I think they are suitable, so it is relatively difficult.