Don't accidentally pull the tip of the needle end of the silk thread, spin back then thrust up along the middle shift positions the needle stabbing points at the end of the line the rim of two sufficiently path.
Do not forget to pull it fully Rotate the needle back and thrust up the middle. Pick the needle points to the opposite end of the line on the second line in moderation.
Please don't pull you to the end. To rotate the needle tip back thrust up the middle line. Shift the position of needle opposite to the tip of the 2 line along the line in moderation.