You can do this at home:

1, after the death of the longicorn beetle, it can be soaked in alcohol for a week. You can use disinfectant alcohol sold in pharmacies. Soak all over when you soak. The function is alcohol dehydration, removing the water in the body of longicorn beetles, and playing a preliminary anti-corrosion role.

If it is too late for alcohol treatment, you can pack your things and put them in the refrigerator first.

2. Soak in alcohol for a week or so, then take it out and set it to dry or dry. If you don't have time to deal with it, you can soak it in alcohol for about a year.

3, take it out of alcohol and use wet plastic surgery. Fix its posture with foam board or cork board, pin or tack. Legs naturally spread symmetrically. It's beautiful.

4. After shaping, dry it in the sun, or dry it with a hair dryer for a long time. Be careful not to blow too hard. Because the body of the longicorn beetle is mainly alcohol at this time, it is easy to volatilize.

5, dry for a few days, completely dry, pull out the pin or tack. Fix the longicorn beetles in the box with glue or insect needles. Put some mothballs to prevent insects. Pay attention to mildew prevention in wet season.

In this way, the specimen is ready. If you don't know the plastic surgery of needles and pins, you can learn about this process by making insect specimens.

I have been making specimens for 10 years. The above is what I think you can do, which is closer to a formal production method. I hope I can help you. You're welcome.