LANPVGET8HFT－100 Stellar Jade + 50k Credits
BA7NCHFA9HWX－100 Stellar Jade + 5 Traveler's Guide
ASN6CHXBRHW3－100 Stellar Jade + 4 Refined Aether
Old codes
8B64E57RPP3P－50 Stellar Jade + 10k Credits
BTN5EL69P6K3－50 Stellar Jade + 10k Credits
Steps
Go to Honkai: Star Rail Official Site then Login/Create an account (if you don't have)
Play to create an account on desired region (America, Europe, Asia, TW/HK/MO).
After that go to Code Redeem Page then input the code to get the rewards
https://twitter.com/houkaistarrail/status/1692509804772684065