Music, dream wedding, please answer. The red circle in the picture, thanks in advance.

Numbers such as 1 and 53 13 represent reference fingering, that is, playing with 5, 3, 1 and 3 fingers. This is marked for beginners to play. You can have your own fingering, or you can use the marking fingering;

2.mp is a "weak medium" in music terminology. When you play, you can be a little weak, gentle and not too strong;

3. Angle brackets like < > also indicate strength. The sharp part is weaker and quieter when playing. Most of the middle part is very strong. What you show in your picture is from weak to strong, and then gradually weak;

4. This part is decorative sound. It means playing sound 3 at a very fast speed, which feels like modifying sound 5, and takes up very little time, very short;

5. The symbol above is a free expansion symbol, indicating that the duration of a note or rest can be freely increased according to the style of the work and the intention of the performer. You can extend the duration of the last note according to your own feelings until you feel you can continue to play the next paragraph.