diff --git a/README b/README
index a559c2a21699465471384fb46237f11827283275..bc556dcd1b707e31dc3919d09df958b3fbf9f86f 100644
--- a/README
+++ b/README
@@ -1,7 +1,22 @@
 AloLang Compiler Readme
 
+AloLang语言编译器自述文档
+
 Distributed under the Lesser General Public License V3
 
+以LGPLv3许可证发布
+
+Project Description:
+
+Compiler for the novel programming language AloLang. For description of AloLang,
+visit https://doc.alolang.org.cn/
+
+项目简介
+
+新型程序语言AloLang的编译器。获取AloLang介绍，请访问https://doc.alolang.org.cn/
+
+Compile Instructions:
+
 To compile, we suggest that you have the project made in a dedicated directory.
 Use the following commands.
 
diff --git a/src/Makefile.am b/src/Makefile.am
index dc1f9b8d55a62995e0a7302f447341bff2f708a5..4193a27ecca7d6eca141b1de8675ad953a041359 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -3,7 +3,7 @@ bin_PROGRAMS = aloc
 aloc_SOURCES = aloc.cpp CompileUnit.cpp preprocessor.cpp Token.cpp utils.cpp\
     ast/AssignmentAST.cpp ast/BaseAST.cpp ast/BinaryExprAST.cpp ast/BoolExprAST.cpp ast/CallExprAST.cpp ast/CodeBlockAST.cpp\
     ast/ExprAST.cpp ast/ExternAST.cpp ast/FunctionAST.cpp ast/IntExprAST.cpp ast/IfExprAST.cpp ast/PrototypeAST.cpp\
-    ast/TypeAST.cpp ast/VariableExprAST.cpp yacc_stuff/tokenizer.lpp
+    ast/TypeAST.cpp ast/VariableExprAST.cpp ast/WhileExprAST.cpp yacc_stuff/tokenizer.lpp
 
 AM_LFLAGS = -o lex.yy.c
 
diff --git a/src/ast/WhileExprAST.cpp b/src/ast/WhileExprAST.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..bad61c28ce2bedd3ad6872ae96cbb3b42094a0cc
--- /dev/null
+++ b/src/ast/WhileExprAST.cpp
@@ -0,0 +1,23 @@
+/*
+ * WhileExprAST.cpp
+ *
+ *  Created on: Feb 20, 2021
+ *      Author: zbc
+ */
+
+#include "WhileExprAST.h"
+
+WhileExprAST::WhileExprAST(CompileUnit *unit, CodeBlockAST *codeblock)
+    : ExprAST(unit)
+{
+}
+
+WhileExprAST::~WhileExprAST()
+{
+    // TODO Auto-generated destructor stub
+}
+
+llvm::Value *WhileExprAST::Codegen(llvm::IRBuilder<> *builder)
+{
+    return nullptr;
+}
diff --git a/src/ast/WhileExprAST.h b/src/ast/WhileExprAST.h
new file mode 100644
index 0000000000000000000000000000000000000000..a6a4e2afccff45ab788f32ee2e17ab0ccbf1257e
--- /dev/null
+++ b/src/ast/WhileExprAST.h
@@ -0,0 +1,21 @@
+/*
+ * WhileExprAST.h
+ *
+ *  Created on: Feb 20, 2021
+ *      Author: zbc
+ */
+
+#ifndef SRC_AST_WHILEEXPRAST_H_
+#define SRC_AST_WHILEEXPRAST_H_
+
+#include "ExprAST.h"
+
+class WhileExprAST : public ExprAST
+{
+  public:
+    WhileExprAST(CompileUnit *unit, CodeBlockAST *codeblock);
+    virtual ~WhileExprAST();
+    llvm::Value *Codegen(llvm::IRBuilder<> *builder);
+};
+
+#endif /* SRC_AST_WHILEEXPRAST_H_ */