Where's the violin equivalent of cdefgab? How do I play it?

The violin equivalent of c d e f g a b is shown in the picture:

Pressing posture ? Fingers are arched and pressed solidly on the string with the middle of the finger end. In order to keep your finger on the string, you should be careful to keep the tip of the finger slightly elevated. When pressing a note that is a semitone higher than an open string (e.g., f), tilt the index finger back slightly.

The most common mistakes are: ① protruding or sunken wrists? ② finger collapse? ③ Palm facing the sky?

In order to prevent the nails from touching the strings and affecting the sound quality, the nails should always be cut short.