diff --git a/README.md b/README.md
index 863aede..0cbfdb8 100644
--- a/README.md
+++ b/README.md
@@ -56,6 +56,7 @@ Project or files:
 ├── __log
 │   └── log4rs
 ├── __misc
+│   ├── fancy-regex
 │   ├── human_panic
 │   ├── lazy_static
 │   ├── num_cpus
@@ -82,6 +83,7 @@ Project or files:
 │   ├── csv
 │   ├── encoding
 │   ├── flatbuffers
+│   ├── hjson
 │   └── serde_json
 ├── __shell
 │   ├── ssh2
@@ -139,7 +141,7 @@ Project or files:
     ├── vec.rs
     └── while.rs
 
-111 directories, 26 files
+113 directories, 26 files
 
 ```
 
diff --git a/__serialization/hjson/Cargo.lock b/__serialization/hjson/Cargo.lock
new file mode 100644
index 0000000..1382abc
--- /dev/null
+++ b/__serialization/hjson/Cargo.lock
@@ -0,0 +1,198 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "aho-corasick"
+version = "0.7.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7404febffaa47dac81aa44dba71523c9d069b1bdc50a77db41195149e17f68e5"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "autocfg"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cdb031dd78e28731d87d56cc8ffef4a8f36ca26c38fe2de700543e627f8a464a"
+
+[[package]]
+name = "hjson"
+version = "0.1.0"
+dependencies = [
+ "serde 1.0.117",
+ "serde-hjson",
+ "serde_json",
+]
+
+[[package]]
+name = "itoa"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dc6f3ad7b9d11a0c00842ff8de1b60ee58661048eb8049ed33c73594f359d7e6"
+
+[[package]]
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+
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+source = "registry+https://github.com/rust-lang/crates.io-index"
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+dependencies = [
+ "serde 0.8.23",
+ "serde_test",
+]
+
+[[package]]
+name = "memchr"
+version = "2.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ee1c47aaa256ecabcaea351eae4a9b01ef39ed810004e298d2511ed284b1525"
+
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+checksum = "92e5113e9fd4cc14ded8e499429f396a20f98c772a47cc8622a736e1ec843c31"
+dependencies = [
+ "num-traits 0.2.14",
+]
+
+[[package]]
+name = "num-traits"
+version = "0.2.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a64b1ec5cda2586e284722486d802acf1f7dbdc623e2bfc57e65ca1cd099290"
+dependencies = [
+ "autocfg",
+]
+
+[[package]]
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+dependencies = [
+ "unicode-xid",
+]
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aa563d17ecb180e500da1cfd2b028310ac758de548efdd203e18f283af693f37"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
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+checksum = "38cf2c13ed4745de91a5eb834e11c00bcc3709e773173b2ce4c56c9fbde04b9c"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-syntax",
+ "thread_local",
+]
+
+[[package]]
+name = "regex-syntax"
+version = "0.6.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3b181ba2dcf07aaccad5448e8ead58db5b742cf85dfe035e2227f137a539a189"
+
+[[package]]
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+checksum = "71d301d4193d031abdd79ff7e3dd721168a9572ef3fe51a1517aba235bd8f86e"
+
+[[package]]
+name = "serde"
+version = "0.8.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9dad3f759919b92c3068c696c15c3d17238234498bbdcc80f2c469606f948ac8"
+
+[[package]]
+name = "serde"
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+checksum = "b88fa983de7720629c9387e9f517353ed404164b1e482c970a90c1a4aaf7dc1a"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde-hjson"
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6a3a4e0ea8a88553209f6cc6cfe8724ecad22e1acf372793c27d995290fe74f8"
+dependencies = [
+ "lazy_static",
+ "linked-hash-map",
+ "num-traits 0.1.43",
+ "regex",
+ "serde 0.8.23",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.117"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cbd1ae72adb44aab48f325a02444a5fc079349a8d804c1fc922aed3f7454c74e"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
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+dependencies = [
+ "itoa",
+ "ryu",
+ "serde 1.0.117",
+]
+
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+ "serde 0.8.23",
+]
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+[[package]]
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+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-xid",
+]
+
+[[package]]
+name = "thread_local"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d40c6d1b69745a6ec6fb1ca717914848da4b44ae29d9b3080cbee91d72a69b14"
+dependencies = [
+ "lazy_static",
+]
+
+[[package]]
+name = "unicode-xid"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f7fe0bb3479651439c9112f72b6c505038574c9fbb575ed1bf3b797fa39dd564"
diff --git a/__serialization/hjson/Cargo.toml b/__serialization/hjson/Cargo.toml
new file mode 100644
index 0000000..1329912
--- /dev/null
+++ b/__serialization/hjson/Cargo.toml
@@ -0,0 +1,13 @@
+[package]
+name = "hjson"
+version = "0.1.0"
+authors = ["Hatter Jiang <jht5945@gmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+serde = { version = "*", features = ["derive"] }
+serde_json = "*"
+serde-hjson = "*"
+
diff --git a/__serialization/hjson/src/main.rs b/__serialization/hjson/src/main.rs
new file mode 100644
index 0000000..0884771
--- /dev/null
+++ b/__serialization/hjson/src/main.rs
@@ -0,0 +1,51 @@
+use serde::{Serialize, Deserialize};
+use serde_json::Number;
+use serde_json::map::Map;
+use serde_json::Value as JsonValue;
+use serde_hjson::Value as HJsonValue;
+
+#[derive(Serialize, Deserialize, Debug)]
+struct Config {
+    id: f64,
+    name: String,
+}
+
+fn main() {
+    let confing_str = r#"
+    {
+        id: 111 // id
+        name: "hatter jiang" // name
+    }
+"#;
+    // let c: Config = serde_hjson::from_str(confing_str).unwrap(); // why not works?
+    let c: HJsonValue = serde_hjson::from_str(confing_str).unwrap();
+    println!("{:#?}", &c);
+    println!("{}", serde_json::to_string_pretty(&map(&c)).unwrap());
+    let cc: Config = serde_json::from_str(&serde_json::to_string_pretty(&map(&c)).unwrap()).unwrap();
+    println!("{}", serde_json::to_string_pretty(&cc).unwrap());
+}
+
+fn map(c: &HJsonValue) -> JsonValue {
+    match c {
+        HJsonValue::Array(a) => {
+            let mut aa = vec![];
+            for x in a.iter() {
+                aa.push(map(x));
+            }
+            JsonValue::Array(aa)
+        }
+        HJsonValue::Bool(b) => JsonValue::Bool(*b),
+        HJsonValue::F64(f) => JsonValue::Number(Number::from_f64(*f).unwrap()),
+        HJsonValue::I64(i) => JsonValue::Number(Number::from_f64(*i as f64).unwrap()),
+        HJsonValue::Null => JsonValue::Null,
+        HJsonValue::Object(o) => {
+            let mut mm = Map::new();
+            for (k, v) in o.iter() {
+                mm.insert(k.to_owned(), map(v));
+            }
+            JsonValue::Object(mm)
+        },
+        HJsonValue::String(s) => JsonValue::String(s.to_owned()),
+        HJsonValue::U64(u) => JsonValue::Number(Number::from_f64(*u as f64).unwrap()),
+    }
+}