First of all, Energy is indeed the official online shop authorized by Nokia. The way to judge whether it is official is simple. See if there is any authorization certificate from Nokia in the store introduction. If it is true, it is basically true. If this thing is forged by Tmall, it is dead, and it is usually true. I know Nengliang, San Ji, Pinchi, Qineng, Jia Hu, Language of Music and so on.
Please accept it if you are satisfied, and ask if you don't understand it.