diff --git a/README.md b/README.md
index a408c8a..0787a44 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,3 @@
 # 113-spring-software-testing
-Labs for NYCU software testing course in 113 spring
+Labs for NYCU software testing course in 113 spring/n
+just branch from TA
diff --git a/lab6/Makefile b/lab6/Makefile
deleted file mode 100644
index bd37e34..0000000
--- a/lab6/Makefile
+++ /dev/null
@@ -1,14 +0,0 @@
-all: target
-
-llvm-pass.so: llvm-pass.so.cc
-	clang-14 `llvm-config-14 --cxxflags` -shared -fPIC $< -o $@
-
-target: target.c llvm-pass.so
-	clang-14 `llvm-config-14 --cflags` -fexperimental-new-pass-manager \
-	 -fpass-plugin=./llvm-pass.so $< -o $@
-
-run:
-	./target 1
-
-clean:
-	rm -f llvm-pass.so target
\ No newline at end of file
diff --git a/lab6/README.md b/lab6/README.md
deleted file mode 100644
index e6c45af..0000000
--- a/lab6/README.md
+++ /dev/null
@@ -1,29 +0,0 @@
-# Lab6
-
-## Introduction
-
-In this lab, you will write a llvm pass to instrument some codes to `target.c` in `llvm-pass.so.cc`.
-
-## Preparation (Important!!!)
-
-1. Sync fork your branch (e.g., `SQLab:311XXXXXX`)
-2. `git checkout -b lab6` (**NOT** your student ID !!!)
-
-## Requirement
-
-Write a llvm pass to instrument some codes to `target.c` in `llvm-pass.so.cc` and satisfy following requirements.
-1. (40%) Invoke debug function with the first argument is 48763 in main function.
-2. (30%) Overwrite argv[1] to "hayaku... motohayaku!" before checking.
-3. (30%) Overwrite argc to 48763 before checking.
-You can run `validate.sh` in your local to test if you satisfy the requirements.
-
-Please note that you must not alter files other than `llvm-pass.so.cc`. You will get 0 points if
-
-1. you modify other files to achieve requirements.
-2. you can't pass all CI on your PR.
-
-## Submission
-
-You need to open a pull request to your branch (e.g. 311XXXXXX, your student number) and contain the code that satisfies the abovementioned requirements.
-
-Moreover, please submit the URL of your PR to E3. Your submission will only be accepted when you present at both places.
diff --git a/lab6/ans b/lab6/ans
deleted file mode 100644
index 0d0a0d8..0000000
--- a/lab6/ans
+++ /dev/null
@@ -1,6 +0,0 @@
-./target 1
-deubg mode
-argc = 48763
-argv[1] = hayaku... motohayaku!
-Your argc is so hayaku!
-Suta... basuto... sutorimu!
diff --git a/lab6/llvm-pass.so.cc b/lab6/llvm-pass.so.cc
deleted file mode 100644
index 6c6e17e..0000000
--- a/lab6/llvm-pass.so.cc
+++ /dev/null
@@ -1,34 +0,0 @@
-#include "llvm/Passes/PassPlugin.h"
-#include "llvm/Passes/PassBuilder.h"
-#include "llvm/IR/IRBuilder.h"
-
-using namespace llvm;
-
-struct LLVMPass : public PassInfoMixin<LLVMPass> {
-  PreservedAnalyses run(Module &M, ModuleAnalysisManager &MAM);
-};
-
-PreservedAnalyses LLVMPass::run(Module &M, ModuleAnalysisManager &MAM) {
-  LLVMContext &Ctx = M.getContext();
-  IntegerType *Int32Ty = IntegerType::getInt32Ty(Ctx);
-  FunctionCallee debug_func = M.getOrInsertFunction("debug", Int32Ty);
-  ConstantInt *debug_arg = ConstantInt::get(Int32Ty, 48763);
-
-  for (auto &F : M) {
-    errs() << "func: " << F.getName() << "\n";
-
-  }
-  return PreservedAnalyses::none();
-}
-
-extern "C" ::llvm::PassPluginLibraryInfo LLVM_ATTRIBUTE_WEAK
-llvmGetPassPluginInfo() {
-  return {LLVM_PLUGIN_API_VERSION, "LLVMPass", "1.0",
-    [](PassBuilder &PB) {
-      PB.registerOptimizerLastEPCallback(
-        [](ModulePassManager &MPM, OptimizationLevel OL) {
-          MPM.addPass(LLVMPass());
-        });
-    }};
-}
-
diff --git a/lab6/target.c b/lab6/target.c
deleted file mode 100644
index c13f2b7..0000000
--- a/lab6/target.c
+++ /dev/null
@@ -1,29 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-void debug(int id)
-{
-    if (id == 48763)
-        printf("deubg mode\n");
-    else
-        printf("bad id!\n");
-}
-
-int main(int argc, char **argv)
-{
-    printf("argc = %d\n", argc);
-    if (argc >= 2)
-        printf("argv[1] = %s\n", argv[1]);
-    else
-        return 0;
-    if (argc == 48763)
-        printf("Your argc is so hayaku!\n");
-    else
-        printf("Your argc need to be modohayaku!\n");
-    if (strcmp(argv[1], "hayaku... motohayaku!") == 0)
-        printf("Suta... basuto... sutorimu!\n");
-    else
-        printf("You dead\n");
-    return 0;
-}
diff --git a/lab6/validate.sh b/lab6/validate.sh
deleted file mode 100755
index a6128bb..0000000
--- a/lab6/validate.sh
+++ /dev/null
@@ -1,43 +0,0 @@
-#!/bin/bash
-
-# Check for unwanted files
-for file in *; do
-  if [[ $file != "llvm-pass.so.cc" && $file != "target.c" && $file != "Makefile" && $file != "README.md" && $file != "validate.sh" && $file != "ans" ]]; then
-    echo "[!] Unwanted file detected: $file."
-    exit 1
-  fi
-done
-
-test_path="${BASH_SOURCE[0]}"
-solution_path="$(realpath .)"
-tmp_dir=$(mktemp -d -t lab5-XXXXXXXXXX)
-answer=""
-
-cd $tmp_dir
-
-rm -rf *
-cp $solution_path/Makefile .
-cp $solution_path/*.c .
-cp $solution_path/*.cc .
-cp $solution_path/ans .
-
-make
-make run > out 2>&1
-result=$(diff --strip-trailing-cr ans out)
-if [[ -n $result ]]; then
-  echo "[!] Expected: "
-  cat ans
-  echo ""
-  echo "[!] Actual:   "
-  cat out
-  echo ""
-  exit 1
-else
-  echo "[V] Pass"
-fi
-
-rm -rf $tmp_dir
-
-exit 0
-
-# vim: set fenc=utf8 ff=unix et sw=2 ts=2 sts=2: