{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How to solve the problem of nodes running out of space?","a":"Implement  a hierarchical storage management system that automatically moves data"}]}],"pr":"da85ec7a2ec852fdb23c2a0f93ea77e94a99680cb977186860befcef6c00c7fc"}