diff --git a/README.md b/README.md
index 1492053..1bb4bf1 100644
--- a/README.md
+++ b/README.md
@@ -1,8 +1,12 @@
-# JOJ3-config-generator
+# JOJ3-forge
 
 [![Codacy Badge](https://app.codacy.com/project/badge/Grade/a98f9aa020874a93bc791a7616fccf21)](https://app.codacy.com/gh/joint-online-judge/JOJ3-config-generator/dashboard)
 [![Codacy Badge](https://app.codacy.com/project/badge/Coverage/a98f9aa020874a93bc791a7616fccf21)](https://app.codacy.com/gh/joint-online-judge/JOJ3-config-generator/dashboard)
 
+## Introduction
+
+`JOJ3-forge` is a CLI tool that generates configuration files for ![JOJ3](https://github.com/joint-online-judge/JOJ3).
+
 ## Getting Started
 
 ### For users
@@ -10,7 +14,7 @@
 1. Install [Python>=3.9](https://www.python.org/) and [pip](https://pip.pypa.io/)
 2. (Optional) Create a virtual environment, check [here](https://packaging.python.org/en/latest/guides/installing-using-pip-and-virtual-environments/).
 3. Install/Upgrade the project by `pip install --force-reinstall --upgrade git+ssh://git@focs.ji.sjtu.edu.cn:2222/JOJ/JOJ3-config-generator.git`
-4. Run it by `joj3-config-generator --help`
+4. Run it by `joj3-forge --help`
 
 ### For developers
 
@@ -23,22 +27,57 @@
 
 ## How to use?
 
-- `joj3-config-generator convert` function is now supported, currently support one argument as input, it indicates the **convert root**
-  - default value on the server can be given as `/home/tt/.config/joj`
+Run `joj3-forge --help` to get basic CLI usage information.
+
+### `convert`
+
+- `joj3-forge convert` function is now supported, currently support one argument as input, it indicates the **convert root*
+  - default value on the server should be given as `/home/tt/.config/joj`
   - **NOTE:** the user should ensure that the ideal `repo.toml` file is in the sub-directory of the **convert root**
   - the intended immutable files should be placed at a sub-directory named `immutable_files` at same position as the `repo.toml` file
+  - a sample directory tree as follows
 
 ```shell
 $ tree .
 .
-|- immutable_files
-| |-- push.yaml
-| |-- release.yaml
-|-- repo.toml
+├── hidden
+│   ├── repo.toml
+│   ├── immutable_files
+│   │   ├── push.yaml
+│   │   └── release.yaml
+│   ├── ex1
+│   │   ├── caseX.in
+│   │   ├── caseX.out
+│   │   ├── conf.json
+│   │   └── conf.toml
+│   └── p1
+│       ├── caseX.in
+│       ├── caseX.out
+│       ├── conf.json
+│       └── conf.toml
+├── students
+│   ├── repo.toml
+│   ├── immutable_files
+│   │   ├── push.yaml
+│   │   └── release.yaml
+│   ├── ex1
+│   │   ├── caseX.in
+│   │   ├── caseX.out
+│   │   ├── conf.json
+│   │   └── conf.toml
+│   └── p1
+│       ├── caseX.in
+│       ├── caseX.out
+│       ├── conf.json
+│       └── conf.toml
+├── students.csv
+└── tools
+    ├── .clang-tidy
+    └── compile
 ```
 
 - sample command on the server
 
 ```shell
-joj3-config-generator convert /home/tt/.config/joj
+joj3-forge convert /home/tt/.config/joj
 ```