PREMIUM-SUMMER-2015 免费试用6个月
DDOS-SUMMER-2015 免费试用6个月
The promotion is active until the end of August 2015 only for new customers. Only one voucher code can be used per account. The voucher can be used, when you are logged into your account, from the Vouchers page in the Subscriptions menu.
https://www.cloudns.net/vouchers