1. A V shape: downward V represents a ventilation mark or > represents a "fading" of music intensity.

2. A downward solid triangle: indicates a beat mark.

3. A point under an arc (add a point below ⌒): extension mark.

4. An upward sliding arrow (↗ curve): upward portamento.

5. A less than sign (<) is the same as a crescendo mark.

6. A wave pattern: Boeing mark.

Extended information:

Other music symbols:

? ‖ § ∮

Sharp (#), flat (b), heavy Sharp (×), heavy flat (bb), (⌒), tuplet (.), dotted (∠), crescendo (||), double vertical line (||:), (:||), measure Repeating signs ∮, diacritical marks

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 re-rising mark (×) means raising the basic note 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.

Reference: Baidu Encyclopedia-Music Symbols