diff --git a/README.md b/README.md
index 38cec31..0758c79 100644
--- a/README.md
+++ b/README.md
@@ -128,7 +128,7 @@ Nali will insert ip information after ip
 Use like ipv4
 
 ```
-➜  ~ nslookup google.com | nali
+$ nslookup google.com | nali
 Server:         127.0.0.53 [局域网 IP]
 Address:        127.0.0.53 [局域网 IP]#53
 
diff --git a/cmd/parse.go b/cmd/parse.go
index 5e3c1bd..c002076 100644
--- a/cmd/parse.go
+++ b/cmd/parse.go
@@ -10,8 +10,44 @@ import (
 var parseCmd = &cobra.Command{
 	Use:   "parse",
 	Short: "Query IP information",
-	Long:  `Query IP information.`,
-	Args:  cobra.MinimumNArgs(1),
+	Long: `Query IP information.
+
+#1 Query a simple IP address
+
+	$ nali 1.2.3.4
+
+  or use pipe
+
+	$ echo IP 6.6.6.6 | nali
+
+#2 Query multiple IP addresses
+
+	$ nali 1.2.3.4 4.3.2.1 123.23.3.0
+
+#3 Interactive query
+
+	$ nali
+	123.23.23.23
+	123.23.23.23 [越南 越南邮电集团公司]
+	quit
+
+#4 Use with dig
+
+	$ dig nali.lgf.im +short | nali
+
+#5 Use with nslookup
+
+	$ nslookup nali.lgf.im 8.8.8.8 | nali
+
+#6 Use with any other program
+
+	bash abc.sh | nali
+
+#7 IPV6 support
+
+	$ nslookup google.com | nali
+`,
+	Args: cobra.MinimumNArgs(1),
 	Run: func(cmd *cobra.Command, args []string) {
 		app.InitIPDB(ipdb.GetIPDBType())
 		app.ParseIPs(args)
diff --git a/cmd/root.go b/cmd/root.go
index 51c8f25..47a8acd 100644
--- a/cmd/root.go
+++ b/cmd/root.go
@@ -15,8 +15,46 @@ import (
 var rootCmd = &cobra.Command{
 	Use:   "nali",
 	Short: "An offline tool for querying IP geographic information",
-	Long:  `An offline tool for querying IP geographic information.`,
-	Args:  cobra.MinimumNArgs(0),
+	Long: `An offline tool for querying IP geographic information.
+
+Find document on: https://github.com/zu1k/nali
+
+#1 Query a simple IP address
+
+	$ nali 1.2.3.4
+
+  or use pipe
+
+	$ echo IP 6.6.6.6 | nali
+
+#2 Query multiple IP addresses
+
+	$ nali 1.2.3.4 4.3.2.1 123.23.3.0
+
+#3 Interactive query
+
+	$ nali
+	123.23.23.23
+	123.23.23.23 [越南 越南邮电集团公司]
+	quit
+
+#4 Use with dig
+
+	$ dig nali.lgf.im +short | nali
+
+#5 Use with nslookup
+
+	$ nslookup nali.lgf.im 8.8.8.8 | nali
+
+#6 Use with any other program
+
+	bash abc.sh | nali
+
+#7 IPV6 support
+
+	$ nslookup google.com | nali
+`,
+	Args: cobra.MinimumNArgs(0),
 	Run: func(cmd *cobra.Command, args []string) {
 		app.InitIPDB(ipdb.GetIPDBType())
 		if len(args) == 0 {