结算费用每天更新一次，发票每月产生一次.您还可以通过程序按需检查使用情况，请按照说明->

The billed charges are updated daily and the invoice is generated monthly. One can also check usage on demand programmatically, follow the instrucions -> https://cloudplatform.googleblog.com/2017/11/monitor-and-manage-your-costs-with.html