How do Miaoyu credits work, and when do they reset?

• One full round (three versions) costs 1 credit. Asking for changes starts a new round
• Automatic intent analysis of new incoming messages is free, up to 400 times per account per day
• If a round fails before any output, the credit is returned. If output was produced or the connection dropped midway, it's charged based on what happened

Membership credits reset every day at midnight Beijing time. They are valid that day only and don't roll over. A top-up pack gives 150 credits valid for 365 days and doesn't change your plan. New accounts get 6 full rounds in total to try it out, not 6 per day. See the Miaoyu page for prices.