Dear Doctor,
In celebrating Arknights' 1.5 Anniversary, the following items will be sent to you through in-game mails on July 30, 20:00 - 24:00 (UTC-7). Please refer to the image for more details. Thank you for your continuous love and support for Arknights!
#Arknights #Yostar

https://twitter.com/ArknightsEN/status/1418178791533256705