New codes, valid until August 14th, 4am UTC (13 hours):
Redeem links:
https://genshin.hoyoverse.com/en/gift?code=8ANCKTWYVRD5
https://genshin.hoyoverse.com/en/gift?code=EA7VKTFHU9VR
https://genshin.hoyoverse.com/en/gift?code=KT7DKSFGCRWD
https://genshin.hoyoverse.com/en/gift?code=XTNDKTEBWA59
https://genshin.hoyoverse.com/en/gift?code=GENSHINGIFT
or in-game: Settings -> Account -> Redeem Code
Note: You need to be Adventure Rank 10 or above to redeem codes.