Free CDN recommendation and collection

Below are some internationally stable free CDNs.

1. Incapsula

There are many nodes, supporting cname and IP binding, and no need to change DNS.
Incapsula's Asian node is good, so you can set the A record to the IP range in this range (you can add multiple A records).
Incapsula official website: https://www.incapsula.com/
Incapsula node range : http://bgp.he.net/AS19551#_prefixes
103.28.251.1 Singapore
103.28.248.1 Singapore
198.143.39.1 Singapore City, Singapore
103.28.250.1 Japan
103.28.249.1 Japan
198.143.44.1 Tokyo, Japan
198.143.42.1 Tokyo, Japan
45.64.64.1 University of Hong Kong
198.143.53.1 Hong Kong unknown operator
199.83.133.1 Los Angeles, USA
199.83.129.1 Los Angeles, USA

The above IPs are all available from .1 to .254

2. CloudFlare

The advantages are that it is free, has many nodes, free SSL, and free DDOS protection.
The disadvantage is that you need to change the DNS to CloudFlare's DNS.
CloudFlare official website: https://www.cloudflare.com/