actually, 改称 does not just mean renaming. stop using it wrong

Everyone thinks 改称 is just a synonym for changing a name. It's not. Look at the kanji 改. It means reform or improve, like in 改善. So 改称 is literally 'improving the name' to match progress or a 昇進. If you're just changing a brand name because of some boring legal thing, you don't use 改称. Honestly, even native speakers get this wrong because they don't think about the kanji roots like we do.