You can top up by logging into your game account through the official top-up centers below. Please make sure to select the correct server and game account during the process.
- Genshin Impact: https://sdk.hoyoverse.com/payment/genshin/index.html#/
- Tears of Themis: https://sdk.hoyoverse.com/payment/tot/index.html#/
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Honkai Impact 3rd:
- Europe & Americas Servers: https://sdk.hoyoverse.com/payment/hk3global/index.html
- SEA Server: https://sdk.hoyoverse.com/payment/hk3os/index.html
- Honkai: Star Rail: https://sdk.hoyoverse.com/payment/hsr/index.html#/
- Zenless Zone Zero: https://sdk.hoyoverse.com/payment/zenless/index.html#/