update

README.md

@@ -9,6 +9,12 @@
 # Overview
 CDK is a clean and concise cross-platform C development kits that is a supplement and extension to the standard C library, rather than a replacement. It provides developers with powerful tools and functions to simplify the process of developing portable C applications. CDK is well-documented, designed to support best coding practices.
 
+# Feature
+- High-performance Asynchronous I/O (IOCP, epoll, kqueue)
+- Cross-platform Compatibility
+- Built-in TLS and DTLS Support
+- Built-in TCP Packet Reassembler
+- Concurrent UDP Server
 
 # Requirement
 The compiler needs to support C11.