Dear members of Apple:
I am a graduate student in China University of Geosciences from China, also a common user of iPhone 7plus. You can call me Su.
I would like to share an idea I thought before during a casual talk with my friend. Detials are as follows. When you made iPhone 6, iPhone 6s, iPhone 6p, iPhone 6sp. I once thought there would be d, even f appeared. Because it is so similar to the electronic configuration type in Chemistry. Maybe you have already realised this funny phenomenon. So, why not go on, I hope you can continue to launch new product of 9d, 9f. And I have already think over the meanings of d, f for you. d means double plus, and f means flying double plus, flying exactly agrees with a popular internet saying in China among young people, Ni Zha Bu Shang Tian, literal translation is Why do not you go to the sky, its actual meaning is describing someone boast himself, also means somthing(like your products) is very great or in a very high level.
It is a very funny idea maybe, I just want to share it with you for reference.
Sincerely expecting you can see this letter, hope you happy every second!
SU Shuyao (Steven)
Oct.13,2017