Recharge SEMs: Recharge SEMs for your account, so that you can get the various services of the Platform ( such as downloads, read paied articles, consultancy service , e-learning, tutor service, online exam, communications, etc.)
default recharge SEMSs for 100 USD.

One USD can recharge 68000 SEMs.

You can check the account banlance and transaction records in account center.

SEM can not be refund to money (such as RMB, USD, etc.）. But SEM can be used in the platform with unlimited time.

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