diff --git a/.github/workflows/docker-image.yml b/.github/workflows/docker-image.yml
index cc14be6..371faac 100644
--- a/.github/workflows/docker-image.yml
+++ b/.github/workflows/docker-image.yml
@@ -15,6 +15,8 @@ jobs:
     steps:
     - name: Checkout
       uses: actions/checkout@v2
+      with:
+        submodules: 'true'
     - name: Set up Docker Buildx
       uses: docker/setup-buildx-action@v1
     - name: Login to DockerHub
diff --git a/Dockerfile b/Dockerfile
index 4a61f05..cee2ccc 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -12,9 +12,9 @@ WORKDIR $workdir
 ENV user root
 USER $user
 COPY artifact/benchmarks $workdir/benchmarks
-COPY artifact/pta/ $workdir/pta
 COPY artifact/util/ $workdir/util/
 COPY artifact/run.py $workdir/
+COPY artifact/qilin.py $workdir/
 COPY artifact/__init__.py $workdir/
-COPY --from=buildEnv /build/artifact/pta/Qilin-1.0-SNAPSHOT.jar $workdir/pta/
+COPY --from=buildEnv /build/artifact/Qilin-1.0-SNAPSHOT.jar $workdir/
 CMD /bin/bash
diff --git a/README.md b/README.md
index 0a7110f..42fd5d7 100644
--- a/README.md
+++ b/README.md
@@ -19,6 +19,17 @@ QiLin is introduced in our ECOOP'22 paper. You might want to cite our paper by c
 }
 ```
 ## A Quick Start
+### Download
+This repository contains a `submodule` that contains a set of real-world ready-to-use benchmarks for QiLin. 
+If you want to run QiLin on these benchmarks, so please use the following command to fetch QiLin sources:
+```
+$ git clone --recurse-submodules https://github.com/QiLinPTA/QiLin.git
+```
+
+If you have cloned QiLin in a normal way, you can use this command to download these benchmarks:
+```
+$ git submodule update --init
+```
 ### Building QiLin with Gradle
 We use Gradle as the build automation tool. To build Qilin, use
 ```
diff --git a/artifact/qilin.py b/artifact/qilin.py
index f0e71f5..721f7c5 100755
--- a/artifact/qilin.py
+++ b/artifact/qilin.py
@@ -14,7 +14,7 @@
 runJava_cmd = 'java -Xms1g %s -cp ' + CLASSPATH + ' driver.Main %s'
 OPTIONMESSAGE = 'The valid OPTIONs are:\n' \
                 + option('-help|-h', 'print this message.') \
-                + option('-jre=<[jre1.6.0_45|jre1.8.0_312]>', 'specify the version of JDK.') \
+                + option('-jre=<JRE>', 'specify the version of JDK.') \
                 + bioption('-Xmx', '\b<MAX>', '  Specify the maximum size, in bytes, of the memory allocation pool.') \
                 + bioption('-timeout', 'seconds', 'Timeout for PTA (default value: -1 (unlimited)).') \
                 + option('-ptahelp', 'print help info for pointer analysis.')
diff --git a/artifact/run.py b/artifact/run.py
index 1c7a54a..d5e2740 100755
--- a/artifact/run.py
+++ b/artifact/run.py
@@ -87,6 +87,7 @@ def runPTA(analysis, bm, OPTIONSTYLE):
             print('old result found. skip this.')
             return
         cmd += ' > ' + outputFile
+    cmd += " -jre=jre1.6.0_45"
     print(cmd)
     pta.runPointsToAnalysis(cmd.split())
 
@@ -99,6 +100,7 @@ def runPTA(analysis, bm, OPTIONSTYLE):
                 + option('-dump', 'dump statistics into files.') \
                 + option('<PTA>', 'specify pointer analysis.') \
                 + option('<Benchmark>', 'specify benchmark.') \
+                + option('-jre=<[jre1.6.0_45|jre1.8.0_312]>', 'specify the JRE version.') \
                 + option('-out=<out>', 'specify output path.') \
                 + option('-M', 'run Turner modularly.') \
                 + option('-pre', 'run pre-analysis only.') \