diff --git a/.gitmodules b/.gitmodules
index d6f32b0..4c093ae 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -10,14 +10,14 @@
 	path = examples/compile/error
 	url = ssh://git@focs.ji.sjtu.edu.cn:2222/FOCS-dev/JOJ3-examples.git
 	branch = compile/error
-[submodule "examples/dummy/success"]
-	path = examples/dummy/success
+[submodule "examples/sample/success"]
+	path = examples/sample/success
 	url = ssh://git@focs.ji.sjtu.edu.cn:2222/FOCS-dev/JOJ3-examples.git
-	branch = dummy/success
-[submodule "examples/dummy/error"]
-	path = examples/dummy/error
+	branch = sample/success
+[submodule "examples/sample/error"]
+	path = examples/sample/error
 	url = ssh://git@focs.ji.sjtu.edu.cn:2222/FOCS-dev/JOJ3-examples.git
-	branch = dummy/error
+	branch = sample/error
 [submodule "examples/keyword/cpplint/sillycode"]
 	path = examples/keyword/cpplint/sillycode
 	url = ssh://git@focs.ji.sjtu.edu.cn:2222/FOCS-dev/JOJ3-examples.git
diff --git a/README.md b/README.md
index 296d0eb..7416adf 100644
--- a/README.md
+++ b/README.md
@@ -40,35 +40,7 @@ Note: you may fail the test if the checking tools are not installed. e.g. For th
 ```bash
 $ make test
 go test -coverprofile cover.out -v ./...
-        focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/cmd/dummy         coverage: 0.0% of statements
-?       focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/executors        [no test files]
-?       focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/parsers  [no test files]
-?       focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/pkg/healthcheck   [no test files]
-        focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/executors/dummy          coverage: 0.0% of statements
-        focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/parsers/cpplint          coverage: 0.0% of statements
-        focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/parsers/diff             coverage: 0.0% of statements
-        focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/stage            coverage: 0.0% of statements
-        focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/pkg/dummy         coverage: 0.0% of statements
-        focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/parsers/keyword          coverage: 0.0% of statements
-        focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/parsers/dummy            coverage: 0.0% of statements
-        focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/executors/sandbox                coverage: 0.0% of statements
-        focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/parsers/resultstatus             coverage: 0.0% of statements
-=== RUN   TestMain
-=== RUN   TestMain/compile/error
-=== RUN   TestMain/compile/success
-=== RUN   TestMain/cpplint/sillycode
-=== RUN   TestMain/dummy/error
-=== RUN   TestMain/dummy/success
-=== RUN   TestMain/keyword/clang-tidy/sillycode
-=== RUN   TestMain/keyword/cpplint/sillycode
---- PASS: TestMain (2.28s)
-    --- PASS: TestMain/compile/error (0.03s)
-    --- PASS: TestMain/compile/success (0.42s)
-    --- PASS: TestMain/cpplint/sillycode (0.14s)
-    --- PASS: TestMain/dummy/error (0.01s)
-    --- PASS: TestMain/dummy/success (0.01s)
-    --- PASS: TestMain/keyword/clang-tidy/sillycode (1.57s)
-    --- PASS: TestMain/keyword/cpplint/sillycode (0.11s)
+...
 PASS
 coverage: 74.0% of statements
 ok      focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/cmd/joj3  2.290s  coverage: 74.0% of statements
diff --git a/cmd/dummy/main.go b/cmd/sample/main.go
similarity index 74%
rename from cmd/dummy/main.go
rename to cmd/sample/main.go
index 63f0d2c..5f2495e 100644
--- a/cmd/dummy/main.go
+++ b/cmd/sample/main.go
@@ -6,13 +6,13 @@ import (
 	"fmt"
 	"os"
 
-	"focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/pkg/dummy"
+	"focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/pkg/sample"
 )
 
 func main() {
 	score := flag.Int("score", 0, "score")
 	flag.Parse()
-	res, err := dummy.Run(dummy.Conf{Score: *score})
+	res, err := sample.Run(sample.Conf{Score: *score})
 	if err != nil {
 		fmt.Fprint(os.Stderr, err)
 		os.Exit(1)
diff --git a/examples/dummy/error b/examples/dummy/error
deleted file mode 160000
index 8571a8b..0000000
--- a/examples/dummy/error
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 8571a8ba30fb2c431d504ed9cfc74d33b9820246
diff --git a/examples/dummy/success b/examples/dummy/success
deleted file mode 160000
index a933d18..0000000
--- a/examples/dummy/success
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit a933d18dda38446d96e36ec5032c6dd48546511b
diff --git a/examples/sample/error b/examples/sample/error
new file mode 160000
index 0000000..aa5bf33
--- /dev/null
+++ b/examples/sample/error
@@ -0,0 +1 @@
+Subproject commit aa5bf333e30c9c0175e021c001d85f90092d7d1a
diff --git a/examples/sample/success b/examples/sample/success
new file mode 160000
index 0000000..ed17357
--- /dev/null
+++ b/examples/sample/success
@@ -0,0 +1 @@
+Subproject commit ed17357671e1c6f8aa7f534a482d9b2fac76d959
diff --git a/internal/parsers/all.go b/internal/parsers/all.go
index 615f90c..f1404a7 100644
--- a/internal/parsers/all.go
+++ b/internal/parsers/all.go
@@ -5,9 +5,9 @@ import (
 	_ "focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/parsers/cppcheck"
 	_ "focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/parsers/cpplint"
 	_ "focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/parsers/diff"
-	_ "focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/parsers/dummy"
 	_ "focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/parsers/keyword"
 	_ "focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/parsers/resultstatus"
+	_ "focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/parsers/sample"
 )
 
 // this file does nothing but imports to ensure all the init() functions
diff --git a/internal/parsers/dummy/meta.go b/internal/parsers/sample/meta.go
similarity index 52%
rename from internal/parsers/dummy/meta.go
rename to internal/parsers/sample/meta.go
index fd9ba75..b71de68 100644
--- a/internal/parsers/dummy/meta.go
+++ b/internal/parsers/sample/meta.go
@@ -1,9 +1,9 @@
-package dummy
+package sample
 
 import "focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/stage"
 
-var name = "dummy"
+var name = "sample"
 
 func init() {
-	stage.RegisterParser(name, &Dummy{})
+	stage.RegisterParser(name, &Sample{})
 }
diff --git a/internal/parsers/dummy/parser.go b/internal/parsers/sample/parser.go
similarity index 75%
rename from internal/parsers/dummy/parser.go
rename to internal/parsers/sample/parser.go
index 26c75c5..70763c9 100644
--- a/internal/parsers/dummy/parser.go
+++ b/internal/parsers/sample/parser.go
@@ -1,11 +1,11 @@
-package dummy
+package sample
 
 import (
 	"encoding/json"
 	"fmt"
 
 	"focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/internal/stage"
-	"focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/pkg/dummy"
+	"focs.ji.sjtu.edu.cn/git/FOCS-dev/JOJ3/pkg/sample"
 	"github.com/criyle/go-judge/envexec"
 )
 
@@ -14,7 +14,7 @@ type Conf struct {
 	Comment string
 }
 
-type Dummy struct{}
+type Sample struct{}
 
 func Parse(executorResult stage.ExecutorResult, conf Conf) stage.ParserResult {
 	stdout := executorResult.Files["stdout"]
@@ -28,8 +28,8 @@ func Parse(executorResult stage.ExecutorResult, conf Conf) stage.ParserResult {
 			),
 		}
 	}
-	var dummyResult dummy.Result
-	err := json.Unmarshal([]byte(stdout), &dummyResult)
+	var sampleResult sample.Result
+	err := json.Unmarshal([]byte(stdout), &sampleResult)
 	if err != nil {
 		return stage.ParserResult{
 			Score:   0,
@@ -37,12 +37,12 @@ func Parse(executorResult stage.ExecutorResult, conf Conf) stage.ParserResult {
 		}
 	}
 	return stage.ParserResult{
-		Score:   dummyResult.Score + conf.Score,
-		Comment: dummyResult.Comment + conf.Comment,
+		Score:   sampleResult.Score + conf.Score,
+		Comment: sampleResult.Comment + conf.Comment,
 	}
 }
 
-func (*Dummy) Run(results []stage.ExecutorResult, confAny any) (
+func (*Sample) Run(results []stage.ExecutorResult, confAny any) (
 	[]stage.ParserResult, bool, error,
 ) {
 	conf, err := stage.DecodeConf[Conf](confAny)
diff --git a/pkg/dummy/dummy.go b/pkg/sample/sample.go
similarity index 82%
rename from pkg/dummy/dummy.go
rename to pkg/sample/sample.go
index 938a7f4..6c9ab5a 100644
--- a/pkg/dummy/dummy.go
+++ b/pkg/sample/sample.go
@@ -1,4 +1,4 @@
-package dummy
+package sample
 
 import (
 	"fmt"
@@ -19,10 +19,10 @@ func Run(conf Conf) (res Result, err error) {
 		// the sandbox, the logs will not show in drone output directly.
 		// If there are more kinds of errors need to be handled separately, add
 		// more fields in the Result struct, don't mess everything up in Stderr.
-		err = fmt.Errorf("dummy negative score: %d", conf.Score)
+		err = fmt.Errorf("sample negative score: %d", conf.Score)
 		return
 	}
 	res.Score = conf.Score
-	res.Comment = "dummy comment"
+	res.Comment = "sample comment"
 	return
 }