The second is to look at the color. Beef is usually dark red or brownish red, and the roasted dried meat is very heavy in color. If the color looks lighter, even blue and white, it is fake.
The third is to look at the texture of shredded pork. The texture of shredded beef is very thick and long, so pork will be more delicate. So thick lines are usually real beef jerky.
The fourth one can be baked in the oven. If you find that there is a lot of oil in dried meat, you usually buy a fake dried pork. Because pork contains much more fat than beef. So after high temperature baking, there will be more grease.
Real experts can tell the truth when they eat it. The real dried beef has a faint smell of beef, while the fake one will have a faint smell of pig hair after you finish eating.