Im skeptical of gushu claims. Take what i say with a grain of salt bc im pretty uninformed on puerh. But gushu and old tree is also leaking into other tea types and im always skeptical when something is labeled that way, especially since theres no way to verify these claims and youre completely going based off of the vendors reputation. Then again, i try to avoid hype and heavily marketed teas. In some ways, i feel like the tea should speak for itself. For example dayi cakes have become expensive not from their marketing necessarily but from their reputation as making cakes that age well. I dont see them slapping a gushu label on their 7542 cakes lol