Add note about Aegis not available in China

Author: RebeccaTamachiro

src/content/docs/aegis/about/ips-allocation.mdx

@@ -13,6 +13,10 @@ Cloudflare Aegis supports both IPv4 and IPv6 addresses.
 
 IPv6 address ranges are deployed globally, meaning your Aegis IPv6 addresses can be used for connections from Cloudflare to your origin servers across all Cloudflare data centers.
 
+:::note[China exception]
+Aegis is currently **not** available in the [Cloudflare China Network](/china-network/), operated by Cloudflare's partner JD Cloud.
+:::
+
 For IPv4 addresses, you should work with your account team to choose the locations where each IP should be deployed. Ideally, your Aegis IPv4 addresses should be placed near your origin servers and adjusted to the amount of traffic expected for each region.
 
 Refer to [connection forwarding](/aegis/about/connection-forwarding/) to understand how requests are processed when reaching different Cloudflare data centers.