Yours about tripled in size and canes in a year. Mine just got it's first new cane in 14 months lol.
I read over the info on that link Saklo provided a few times, it's a bit overwhelming- so is the debate, that Bambusa Nana (Thai Beauty) is a clone from an unknown species from the Quail Botanical Gardens in the 70's, and may not be from Thailand at all?
Or that bambusa nana and Phai Liang are both from Thailand, but separate species often being sold as the same species?
I will be curious what I actually have when it gets more mature, too hard to tell right now.