diff --git a/README.md b/README.md
index 607df2b..2fb289d 100644
--- a/README.md
+++ b/README.md
@@ -2,65 +2,38 @@
 
 Cloud Integrated SCSI Target framework, this includes two binaries, one is `citadm` which is command line to config and control, the other is `citd` which is a target daemon.
 
-```
-# citadm --help
-Linux SCSI Target administration utility, version 0.1
-Usage: ./citadm [OPTIONS]
-
-Application Options:
-	--lld <driver> --mode target --op new --tid <id> --targetname <name>
-		add a new target with <id> and <name>. <id> must not be zero.
-	--lld <driver> --mode target --op delete [--force] --tid <id>
-		delete the specific target with <id>.
-		With force option, the specific target is deleted
-		even if there is an activity.
-	--lld <driver> --mode target --op show
-		show all the targets.
-	--lld <driver> --mode target --op show --tid <id>
-		show the specific target's parameters.
-	--lld <driver> --mode target --op update --tid <id> --name <param> --value <value>
-		change the target parameters of the target with <id>.
-	--lld <driver> --mode target --op bind --tid <id> --initiator-address <address>
-	--lld <driver> --mode target --op bind --tid <id> --initiator-name <name>
-		enable the target to accept the specific initiators.
-	--lld <driver> --mode target --op unbind --tid <id> --initiator-address <address>
-	--lld <driver> --mode target --op unbind --tid <id> --initiator-name <name>
-		disable the specific permitted initiators.
-	--lld <driver> --mode logicalunit --op new --tid <id> --lun <lun>
-	--backing-store <path> --bstype <type> --bsopts <bs options> --bsoflags <options>
-		add a new logical unit with <lun> to the specific
-		target with <id>. The logical unit is offered
-		to the initiators. <path> must be block device files
-		(including LVM and RAID devices) or regular files.
-		bstype option is optional.
-		bsopts are specific to the bstype.
-		bsoflags supported options are sync and direct
-		(sync:direct for both).
-	--lld <driver> --mode logicalunit --op delete --tid <id> --lun <lun>
-		delete the specific logical unit with <lun> that
-		the target with <id> has.
-	--lld <driver> --mode account --op new --user <name> --password <pass>
-		add a new account with <name> and <pass>.
-	--lld <driver> --mode account --op delete --user <name>
-		delete the specific account having <name>.
-	--lld <driver> --mode account --op bind --tid <id> --user <name> [--outgoing]
-		add the specific account having <name> to
-		the specific target with <id>.
-		<user> could be <IncomingUser> or <OutgoingUser>.
-		If you use --outgoing option, the account will
-		be added as an outgoing account.
-	--lld <driver> --mode account --op unbind --tid <id> --user <name> [--outgoing]
-		delete the specific account having <name> from specific
-		target. The --outgoing option must be added if you
-		delete an outgoing account.
-	--lld <driver> --mode lld --op start
-		Start the specified lld without restarting the tgtd process.
-	--control-port <port> use control port <port>
-
-Help Options:
-	--help
-		display this help and exit
-
-Report bugs via <https://github.com/gostor/gotgt/issues>.
+## Build
 
 ```
+$ mkdir $GOPATH/gotstor/
+$ cd $GOPATH/gostor/
+$ git clone https://github.com/gostor/gotgt gotgt
+$ cd gotgt
+$ make
+```
+
+## Test
+
+You can test this with [libiscsi](https://github.com/gostor/libiscsi).
+
+### build the test tool of libiscsi
+
+```
+$ git clone https://github.com/gostor/libiscsi
+$ cd libiscsi
+$ ./autogen.sh
+$ ./configure
+$ make
+```
+
+### start the gotgt daemon
+
+```
+$ ./citd
+```
+
+### begin the test
+
+```
+$ ./iscsi-test-cu -v iscsi://127.0.0.1:3260/iqn.test.haha/0
+```