On September 5, Luna�and Amber posted nostalgic group photos via Instagram of their fellow f(x) members together in light of the group's eighth year anniversary since their debut.

Luna posted a photo with a caption that read, "8th Anniversary already...let's light up the night!"

While Amber posted three photos and a longer caption that read, "Found a lot of good memories going through old photos^^

When I didn't know how to say anything, they helped me, when I was scared and discouraged they told me not to stop and to never give up, when I was lonely they would pick up my random phone calls, and they even laughed at my stupid dad jokes haha� its been a crazy but amazing 9 years with them, laughing together, crying together, and even arguing with one another� and I hope to make more special memories with these crazy girls :) Thank you to my members, always! Love you guys!

f(x) is 8 years old!! Just want to thank all you MeUs out there. If theres no MeU, theres no f(x)! I can still hear all those crazy fan chants like it was yesterday. Thank you guys for everything and we going to keep working hard! Love you guys, THANK YOU! [sic]"

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Seeing this, fans commented, "Thanks for all these years, I'm so proud of you," "Happy 8th anniversary," "Love you and miss you," "Waiting for your comeback, happy anniversary," "Congratulations!"

� ?? 8?... ??? ???? ! ??? ??? ?? ??

A post shared by Luna ?? (@hermosavidaluna) on Sep 5, 2017 at 12:01am PDT

??? ????? ?? ???? ????^^ ?? ?? ? ??? ? ? ? ?? ????, ?? ??? ??? ????? ?? ???, ??? ??????? ????? ??, ?? ???? ?? ?? ? ?? ??, ? ?? ?? ????? ??????.. 9??? ?? ?? ?? ???�.??? ??? ????? ???? ? ?? ?????! ?? ??? ?? ??? ???! ????? ?? 8??? ?? ?? ???? ?????!!! ???? ???? ????? ??????! ??? ?? ??? ????? ?????? ? ????. ?? ??? ?????^^ ???? ????! Found a lot of good memories going through old photos^^ When I didn't know how to say anything, they helped me, when I was scared and discouraged they told me not to stop and to never give up, when I was lonely they would pick up my random phone calls, and they even laughed at my stupid dad jokes haha� its been a crazy but amazing 9 years with them, laughing together, crying together, and even arguing with one another� and I hope to make more special memories with these crazy girls :) Thank you to my members, always! Love you guys! f(x) is 8 years old!! Just want to thank all you MeUs out there. If theres no MeU, theres no f(x)! I can still hear all those crazy fan chants like it was yesterday. Thank you guys for everything and we going to keep working hard! Love you guys, THANK YOU!

A post shared by Amber J. Liu ??? (@ajol_llama) on Sep 4, 2017 at 11:04pm PDT