What kind of Wolff compound fertilizer is real?

If it is your name, it is a fake. Wolf is a brand owned by Shandong Jin Zhengda Company, just like KFC owned by Parkson Group. There are more wolf advertisements, and it is not excluded that some lawless people make fakes. The only advice I can give you is to buy it in a large agricultural store. Because it is not easy for the naked eye to see the truth. I can't explain it clearly in one or two sentences. But if the landlord refers to "Wolf", I have been a farmer for nearly 10 years and have never heard of this brand.