diff --git a/README.md b/README.md
index ec1b16b..a370f8e 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 # ZgaPdfSigner
 A javascript tool to sign a pdf or set protection of a pdf in web browser.  
-And it also can be used in Google Apps Script and nodejs.  
+And it is more powerful when used in [Google Apps Script](https://developers.google.com/apps-script) or [nodejs](https://nodejs.org/).  
 
 PS: __ZGA__ is the abbreviation of my father's name.  
 And I use this name to hope the merits from this application will be dedicated to my parents.
@@ -11,10 +11,11 @@ And I use this name to hope the merits from this application will be dedicated t
 
 * Sign a pdf with an invisible pkcs#7 signature.
 * Sign a pdf with a visible pkcs#7 signature by drawing an image.
-* Sign a pdf and set DocMDP(document modification detection and prevention).
+* Sign a pdf and set [DocMDP](#note).
 * Add a new signature to a pdf if it has been signed already. (An incremental update)
-* Add a document timestamp from TSA(Time Stamp Authority). (Only in Google Apps Script and nodejs)
-* Sign a pdf with a timestamp from TSA. (Only in Google Apps Script and nodejs)
+* Add a document timestamp from [TSA](#note). (__Not__ available in web browser)
+* Sign a pdf with a timestamp from [TSA](#note). ((__Not__ available in web browser)
+* Enable signature's [LTV](#note). (__Not__ available in web browser)
 * Set password protection to a pdf. Supported algorithms:
   * 40bit RC4 Encryption
   * 128bit RC4 Encryption
@@ -23,10 +24,10 @@ And I use this name to hope the merits from this application will be dedicated t
 * Set public-key certificate protection to a pdf.
   Supported algorithms are as same as the password protection.
 
-## About signing with TSA
+## About signing with [TSA](#note) and [LTV](#note)
 
-Because of the CORS security restrictions in web browser,
-signing with a timestamp from TSA can only be used in Google Apps Script.
+Because of the [CORS](#note) security restrictions in web browser,
+signing with a timestamp from [TSA](#note) or enabling [LTV](#note) can only be used in [Google Apps Script](https://developers.google.com/apps-script) or [nodejs](https://nodejs.org/).
 
 ## The Dependencies
 
@@ -35,11 +36,47 @@ signing with a timestamp from TSA can only be used in Google Apps Script.
 
 ## How to use this tool
 
+### Web Browser
 Just import the dependencies and this tool.
 ```html
 <script src="https://unpkg.com/pdf-lib@1.17.1/dist/pdf-lib.min.js" type="text/javascript"></script>
 <script src="https://unpkg.com/node-forge@1.3.1/dist/forge.min.js" type="text/javascript"></script>
-<script src="https://github.com/zboris12/zgapdfsigner/releases/download/2.2.0/zgapdfsigner.min.js" type="text/javascript"></script>
+<script src="https://github.com/zboris12/zgapdfsigner/releases/download/2.5.0/zgapdfsigner.min.js" type="text/javascript"></script>
+```
+
+### [Google Apps Script](https://developers.google.com/apps-script)
+Load the dependencies and this tool.
+```js
+// Simulate setTimeout function for pdf-lib
+function setTimeout(func, sleep){
+  Utilities.sleep(sleep);
+  func();
+}
+// Simulate window for node-forge
+var window = globalThis;
+// Load pdf-lib
+eval(UrlFetchApp.fetch("https://unpkg.com/pdf-lib@1.17.1/dist/pdf-lib.min.js").getContentText());
+// Load node-forge
+eval(UrlFetchApp.fetch("https://unpkg.com/node-forge@1.3.1/dist/forge.min.js").getContentText());
+// Load ZgaPdfSigner
+eval(UrlFetchApp.fetch("https://github.com/zboris12/zgapdfsigner/releases/download/2.5.0/zgapdfsigner.min.js").getContentText());
+```
+Or simply import the library of [ZgaPdfToolkit](https://script.google.com/macros/library/d/1T0UPf50gGp2fJ4dR1rZfEFgKYC5VpCwUVooCRNySiL7klvIUVsFBCZ9m/5)
+1. Add the library of ZgaPdfToolkit to your project, and suppose the id of library you defined is "pdfkit".  
+   Script id: `1T0UPf50gGp2fJ4dR1rZfEFgKYC5VpCwUVooCRNySiL7klvIUVsFBCZ9m`
+2. Load the library.
+```js
+pdfkit.loadZga(globalThis);
+```
+
+### [nodejs](https://nodejs.org/)
+1. Install
+```
+npm install zgapdfsigner
+```
+2. Import
+```js
+const Zga = require("zgapdfsigner");
 ```
 
 ## Let's sign
@@ -105,38 +142,123 @@ Sign with a visible signature of drawing a text.
 //TODO
 ```
 
-Use it in Google Apps Script
+Use it in [Google Apps Script](https://developers.google.com/apps-script)
 
 ```js
-// Simulate setTimeout function for pdf-lib
-function setTimeout(func, sleep){
-  Utilities.sleep(sleep);
-  func();
+/**
+ * @param {string} pwd Passphrase of certificate
+ * @return {Promise}
+ */
+async function createPdf(pwd){
+  // Load pdf, certificate
+  var pdfBlob = DriveApp.getFilesByName("_test.pdf").next().getBlob();
+  var certBlob = DriveApp.getFilesByName("_test.pfx").next().getBlob();
+  // Sign the pdf
+  /** @type {SignOption} */
+  var sopt = {
+    p12cert: certBlob.getBytes(),
+    pwd,
+    signdate: "1",
+    ltv: 1,
+  };
+  var signer = new Zga.PdfSigner(sopt);
+  var u8arr = await signer.sign(pdfBlob.getBytes());
+  // Save the result pdf to some folder
+  var fld = DriveApp.getFolderById("a folder's id");
+  fld.createFile(Utilities.newBlob(u8arr, "application/pdf").setName("signed_test.pdf"));
+}
+```
+
+Use queryPassword function in [ZgaPdfToolkit](https://script.google.com/macros/library/d/1T0UPf50gGp2fJ4dR1rZfEFgKYC5VpCwUVooCRNySiL7klvIUVsFBCZ9m/5).
+
+```js
+function myfunction(){
+  var spd = SpreadsheetApp.getActiveSpreadsheet();
+  pdfkit.queryPassword("createPdf", "Please input the passphrase", spd.getName());
+}
+```
+
+Use it in [nodejs](https://nodejs.org/)
+```js
+const m_fs = require("fs");
+const m_path = require("path");
+async function main(){
+  /** @type {string} */
+  var pdfPath = m_path.join(__dirname, "_test.pdf");
+  /** @type {string} */
+  var pfxPath = m_path.join(__dirname, "_test.pfx");
+  /** @type {string} */
+  var ps = "";
+  /** @type {string} */
+  var imgPath = m_path.join(__dirname, "_test.png");
+
+  if(process.argv.length > 3){
+    pfxPath = process.argv[2];
+    ps = process.argv[3];
+  }else if(process.argv[2]){
+    ps = process.argv[2];
+  }
+
+  if(!ps){
+    // throw new Error("The passphrase is not specified.");
+    pfxPath = "";
+  }
+
+  /** @type {Buffer} */
+  var pdf = m_fs.readFileSync(pdfPath);
+  /** @type {Buffer} */
+  var pfx = null;
+  if(pfxPath){
+    pfx = m_fs.readFileSync(pfxPath);
+  }
+  /** @type {Buffer} */
+  var img = null;
+  /** @type {string} */
+  var imgType = "";
+  if(imgPath){
+    img = m_fs.readFileSync(imgPath);
+    imgType = m_path.extname(imgPath).slice(1);
+  }
+
+  /** @type {SignOption} */
+  var sopt = {
+    p12cert: pfx,
+    pwd: ps,
+    permission: pfx ? 2 : 0,
+    signdate: "1",
+    reason: "I have a test reason.",
+    location: "I am on the earth.",
+    contact: "zga@zga.com",
+    ltv: 1,
+    debug: true,
+  };
+  if(img){
+    sopt.drawinf = {
+      area: {
+        x: 25, // left
+        y: 150, // top
+        w: 60,
+        h: 60,
+      },
+      imgData: img,
+      imgType: imgType,
+    };
+  }
+
+  /** @type {Zga.PdfSigner} */
+  var ser = new Zga.PdfSigner(sopt);
+  /** @type {Uint8Array} */
+  var u8dat = await ser.sign(pdf);
+
+  if(u8dat){
+    /** @type {string} */
+    var outPath = m_path.join(__dirname, "test_signed.pdf");
+    m_fs.writeFileSync(outPath, u8dat);
+    console.log("Output file: " + outPath);
+  }
+
+  console.log("Done");
 }
-// Simulate window for node-forge
-var window = globalThis;
-// Load pdf-lib
-eval(UrlFetchApp.fetch("https://unpkg.com/pdf-lib@1.17.1/dist/pdf-lib.min.js").getContentText());
-// Load node-forge
-eval(UrlFetchApp.fetch("https://unpkg.com/node-forge@1.3.1/dist/forge.min.js").getContentText());
-// Load ZgaPdfSigner
-eval(UrlFetchApp.fetch("https://github.com/zboris12/zgapdfsigner/releases/download/2.2.0/zgapdfsigner.min.js").getContentText());
-
-// Load pdf, certificate
-var pdfBlob = DriveApp.getFilesByName("_test.pdf").next().getBlob();
-var certBlob = DriveApp.getFilesByName("_test.pfx").next().getBlob();
-// Sign the pdf
-/** @type {SignOption} */
-var sopt = {
-  p12cert: certBlob.getBytes(),
-  pwd: "some passphrase",
-  signdate: "1",
-};
-var signer = new Zga.PdfSigner(sopt);
-var u8arr = await signer.sign(pdfBlob.getBytes());
-// Save the result pdf to some folder
-var fld = DriveApp.getFolderById("a folder's id");
-fld.createFile(Utilities.newBlob(u8arr, "application/pdf").setName("signed_test.pdf"));
 ```
 
 ## Detail of SignOption
@@ -144,7 +266,7 @@ fld.createFile(Utilities.newBlob(u8arr, "application/pdf").setName("signed_test.
 * __p12cert__: Array<number>|Uint8Array|ArrayBuffer|string :point_right: (Optional) Certificate's data. In the case of adding a document timestamp, it must be omitted.
 * __pwd__: string :point_right: (Optional) The passphrase of the certificate. In the case of adding a document timestamp, it must be omitted.
 * __permission__: number :point_right: (Optional) The modification permissions granted for this document.
-  This is a setting of DocMDP(document modification detection and prevention). Valid values are:
+  This is a setting of [DocMDP](#note). Valid values are:
   * 1: No changes to the document are permitted; any change to the document invalidates the signature.
   * 2: Permitted changes are filling in forms, instantiating page templates, and signing; other changes invalidate the signature.
   * 3: Permitted changes are the same as for 2, as well as annotation creation, deletion, and modification; other changes invalidate the signature.
@@ -153,7 +275,7 @@ fld.createFile(Utilities.newBlob(u8arr, "application/pdf").setName("signed_test.
 * __contact__: string :point_right: (Optional) Your contact information
 * __signdate__: Date|string|_TsaServiceInfo_ :point_right: (Optional) In the case of adding a document timestamp, it can't be omitted and can't be a Date.
   * When it is a Date, it means the date and time of signing.
-  * When it is a string, it can be an url of TSA or an index of the preset TSAs as below:
+  * When it is a string, it can be an url of [TSA](#note) or an index of the preset [TSA](#note)s as below:
     * "1": http://ts.ssl.com
     * "2": http://timestamp.digicert.com
     * "3": http://timestamp.sectigo.com
@@ -161,12 +283,15 @@ fld.createFile(Utilities.newBlob(u8arr, "application/pdf").setName("signed_test.
     * "5": http://timestamp.apple.com/ts01
     * "6": http://www.langedge.jp/tsa
     * "7": https://freetsa.org/tsr
-  * When it is a _TsaServiceInfo_, it means a full customized information of a TSA.
-    * __url__: string :point_right: The url of TSA
+  * When it is a _TsaServiceInfo_, it means a full customized information of a [TSA](#note).
+    * __url__: string :point_right: The url of [TSA](#note)
     * __len__: number :point_right: (Optional) The length of signature's placeholder
-    * __headers__: Object<string, *> :point_right: (Optional) The customized headers for sending to tsa server
+    * __headers__: Object<string, *> :point_right: (Optional) The customized headers for sending to [TSA](#note) server
   * When it is omitted, the system timestamp will be used.
 * __signame__: string :point_right: (Optional) The name of the signature
+* __ltv__: number :point_right: (Optional) Type of [LTV](#note). Valid values are:
+  * 1: auto; Try using [OCSP](#note) only to enable the [LTV](#note) first; If can't, try using [CRL](#note) to enable the [LTV](#note).
+  * 2: crl only; Only try using [CRL](#note) to enable the [LTV](#note).
 * __drawinf__: _SignDrawInfo_ :point_right: (Optional) Visible signature's information
   * __area__: _SignAreaInfo_ :point_right: The signature's drawing area, these numbers are dots on 72dpi.
     * __x__: number :point_right: Distance from left
@@ -315,3 +440,11 @@ async function signAndProtect2(pdf, cert, pwd){
 
 This tool is available under the
 [MIT license](https://opensource.org/licenses/MIT).
+
+## Note
+* __CORS__: Cross-Origin Resource Sharing
+* __CRL__: Certificate Revocation Lists
+* __DocMDP__: Document Modification Detection and Prevention
+* __LTV__: Long-Term Validation
+* __OCSP__: Online Certificate Status Protocol
+* __TSA__: Time Stamp Authority
diff --git a/package.json b/package.json
index a610319..2768936 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "zgapdfsigner",
-  "version": "2.3.0",
+  "version": "2.5.0",
   "author": "zboris12",
   "description": "A javascript tool to sign a pdf or set protection to a pdf in web browser, Google Apps Script and nodejs.",
   "homepage": "https://github.com/zboris12/zgapdfsigner",
@@ -24,7 +24,8 @@
     "pdf-encryption",
     "google-apps-script",
     "LTV",
-    "TSA"
+    "TSA",
+    "長期署名"
   ],
   "scripts": {
     "build": "node closure.js",