Both the > and ^ in the staff represent accent marks, and ?>? or ^ or ?sf? are marked on top of the notes, indicating that the note must be sung (played) powerfully.

1. The sharp sign (#) indicates raising the basic pitch level by a semitone.

2. Flat mark (b) means lowering the basic pitch level by a semitone.

3. The double-rising mark (×) means raising the basic tone level by two semitones (one whole tone).

4. The double flat mark (bb) means lowering the basic tone level by two semitones (one whole tone).

5. The restoration mark (ヰ) means to restore the sound that has been raised or lowered.

Extended information:

1. Music symbols are used to express different characteristics of sounds, such as pitch, duration, volume, expression marks and tips on performance techniques. The essence of music is goodness, and notes are the building blocks that build the castle of goodness.

2. Thirty-second notes: The black notes with stems and 3 tails are called "thirty-second notes". It is half smaller than the sixteenth note and equal to the duration of 1/32 of the whole note;

3. Sixty-fourth note: The black note with four stems and tails is called "sixty-four" diaeresis". It is half smaller than a thirty-second note and equal to 1/64 of the duration of a whole note.