积累基金 do not become available for use until 20日 days after your order is delivered to you.
Please note that 积累基金 remain pending in case the order is cancelled or returned. Pending 积累基金 cannot be used as a payment menthod.
Once the 积累基金 become available (=Total 积累基金 earned - 积累基金 used - 积累基金 pending), you can use them like cash to pay for any purchases.
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