Although it's called a tutorial… since my own making is not perfect and I've never made a tutorial before, I'll just share my experience in making it.
First, we need to prepare 2 meters of main fabric and half a meter of contrasting trim fabric. Here, I used light purple with dark purple, which looks quite fresh. Also, you need kraft paper (or any other paper) for drafting the pattern.
For drafting, I used the pattern from a previous project (okay, I'm lazy), but pay attention to the sleeves (I feel that 25 cm wide sleeves are good, and the total sleeve length can be measured from your left elbow to your right elbow when your arms are stretched out horizontally). The width at the chest area should be half of your chest measurement, with some extra allowance, and also leave space for the seam allowance.
By the way, the shape I drew is based on my feeling, just make sure it's symmetrical on both sides (I am so casual…)
I forgot to mention, since my dorm room is very small, I brought the materials to a large table in the library study room (very suitable for students), which is more convenient. Note that my drafting method is not standard, but due to the lack of large paper, this is a bit lazy…
Then, I don't know how to explain it, just draw a curved diagonal line roughly. I didn't measure, just by feeling (generally, a 17 cm wide neckline in summer should be fine? Remember to keep the neckline symmetrical). Draw a line from the right side of the neckline to somewhere (the waist edge, maybe). In summer, the crossed neckline can be shallower and doesn't have to reach under the armpits.
Next, lay the fabric flat, place the pattern on the fabric, and trace the outline with chalk (pay attention to the layout on the fabric to avoid cutting randomly and running out of fabric later…). (Later, I found the sleeves were too short, so I added a piece… Pay attention, if you wear the half-sleeve Hanfu alone, especially for men, too short sleeves will look bad.) Remember to leave space for the center seam.
Then flip the pattern over and trace again (since the previous one was not symmetrical with the fabric edge, I had to redraw it…). For the back piece, slightly round the neckline with chalk (as shown in the picture). Pay attention to the smoothness of the edges.
Cut out all the traced pieces (note not to cut the folded shoulder part).
Next, cut the trim (light purple part). The width is up to your preference, but leave enough seam allowance. Note that the length should be a bit longer to avoid running out of fabric, and you can always join pieces if needed.
After sewing, the principle is as follows: the dark purple part is wider, and the light purple part is narrower. The front side of the trim is light purple, and use an iron to fold part of the dark purple to the front, creating a two-tone effect (as shown in the picture).
Finally, after attaching the neckline, make the ties, and hand-stitch the edges inside the garment (there are many tutorials for attaching the neckline and making ties in the community). Is it simple, right?
END