Alibaba Cloud will adjust the prices of the following billable items of subscription Anti-DDoS Proxy (Chinese Mainland) instances from April 24, 2024.

1. Subscription QPS
Before price adjustment, you are charged for subscription queries per second (QPS) at the fixed unit price.
QPS<=3000: free of charge
QPS>3000: USD 1.5 per QPS-month

After price adjustment, you are charged for subscription queries per second (QPS) in graduated pricing mode.
QPS<=3000:free of charge
3000<QPS<=5000: USD 1.5 per QPS-month
5000<QPS<=8000: USD 1.425 per QPS-month
8000<QPS<=10000: USD 1.35 per QPS-month
10000<QPS<=50000: USD 1.275 per QPS-month
50000<QPS<=100000: USD 1.05 per QPS-month
100000<QPS<=300000: USD 0.9 per QPS-month

2. Number of domain names that can be protected
Before price adjustment, you are charged for the number of domain names that can be protected by a subscription instance at the fixed unit price.
【Standard Function】
Domains<=50: free of charge
Domains> 50: USD 4.5 per domain-month
【Enhanced Function】
Domains<=50: free of charge
Domains> 50: USD 7.5 per domain-month

After price adjustment, you are charged for the number of domain names that can be protected by a subscription instance in graduated pricing mode.
【Standard Function】
Domains<=50: free of charge
50<Domains<=200: USD 4.5 per domain-month
200<Domains<=600: USD 4.2 per domain-month
600<Domains<=2000: USD 3.9 per domain-month
2000<Domains<=20000: USD 2.7 per domain-month
【Enhanced Function】
Domains<=50: free of charge
50<Domains<=200: USD 7.5 per domain-month
200<Domains<=600: USD 7 per domain-month
600<Domains<=2000: USD 6.5 per domain-month
2000<Domains<=20000: USD 4.5 per domain-month

3. Number of ports that can be protected
Before price adjustment, you are charged for the number of ports that can be protected by a subscription instance at the fixed unit price.
Ports<=50: free of charge
Ports>50: USD 7.5 per port-month

After price adjustment, you are charged for the number of ports that can be protected by a subscription instance in graduated pricing mode.
Ports<=50: free of charge
50<Ports<=150: USD 7.5 per port-month
150<Ports<=400: USD 6.75 per port-month
400<Ports<=1000: USD 6 per port-month
1000<Ports<=3000: USD 4.5 per port-month

Graduated pricing mode
In graduated pricing mode, you are charged for billable items based on the specifications that you purchase. Fees are calculated based on the unit prices in different ranges and then accumulated.
For example, you purchase the bandwidth of 600 Mbit/s and are charged for the bandwidth based on the following pricing rules: The unit price of bandwidth in the range of 0 to 500 Mbit/s is USD 1 per Mbit/s-month, and the unit price of bandwidth in the range of 501 Mbit/s to 1,000 Mbit/s is USD 0.8 per Mbit/s-month. The monthly total fee in tiered pricing mode is calculated based on the following formula: Monthly total fee = 500 Mbit/s × USD 1 per Mbit/s-month + 100 Mbit/s × USD 0.8 per Mbit/s-month = USD 580.
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