diff --git a/src/css/dr.css b/src/css/dr.css
index 486878e..4d208eb 100644
--- a/src/css/dr.css
+++ b/src/css/dr.css
@@ -184,3 +184,25 @@ a:focus {
     position: fixed;
     z-index: 7355607;
 }
+
+#bullet {
+    position: absolute;
+    top: 32px;
+    font-size: 26px;
+    word-spacing: -8px;
+    opacity: 0;
+}
+
+#bullet span {
+    padding: 12px;
+}
+
+#b-e {
+    background-color: aliceblue;
+    border-radius: 16px 0px 0px 16px;
+}
+
+#b-c {
+    background-color: darkviolet;
+    border-radius: 0px 16px 16px 0px;
+}
diff --git a/src/index.html b/src/index.html
index 29a3cdb..6db5858 100644
--- a/src/index.html
+++ b/src/index.html
@@ -17,6 +17,10 @@
     <span id="mobile-arrow-prev" onclick="impress('impress').prev();"></span>
     <span id="mobile-arrow-next" onclick="slideHandler();"></span>
   </div>
+  <div id="bullet">
+    <span id="b-e">drone</span>
+    <span id="b-c">无人机</span>
+  </div>
   <div id="impress" data-transition-duration="1000" data-width="1024" data-height="768" data-max-scale="3" data-min-scale="0" data-perspective="1000">
     <div class="step" id="step1">
       <div>
@@ -107,6 +111,8 @@
     impress().init();
     document.currentStep = 1;
     document.totalStep = document.stepFunctions.length;
+    document.currentBullet = 0;
+    document.totalBullet = document.bullets.length;
   </script>
 </body>
 
diff --git a/src/js/dr.js b/src/js/dr.js
index f16db33..6a42794 100644
--- a/src/js/dr.js
+++ b/src/js/dr.js
@@ -4,6 +4,7 @@ console.log("version：1.2.5")
 var api = impress("impress")
 
 document.stepFunctions = []
+document.bullets = [{"e":"drone","c":"无人机"}]
 
 function slideHandler() {
     if (document.currentStep <= document.totalStep) {
@@ -37,6 +38,10 @@ document.addEventListener("keyup", (event) => {
         case 82: // r
             location.hash = "#/step1"
             location.reload()
+            break
+        case 78: // n
+            shootBullet()
+            break
     }
 }, false)
 
@@ -172,6 +177,31 @@ document.stepFunctions.push(() => {
     }, 1500)
 })
 
+function shootBullet() {
+    if (document.currentBullet === document.totalBullet) {
+        document.currentBullet = 0
+    }
+    const bd = document.querySelector("#bullet") // bullet dom
+    const be = document.bullets[document.currentBullet].e // bullet english
+    const bc = document.bullets[document.currentBullet].c // bullet chinese
+    document.querySelector("#b-e").innerText = be
+    document.querySelector("#b-c").innerText = bc
+    bd.style.setProperty("left", "calc(50% - " + (bd.offsetWidth / 2).toString() + "px)")
+    bd.classList.add("animate__animated","animate__backInRight")
+    setTimeout(() => {
+        const bd = document.querySelector("#bullet")
+        bd.style.setProperty("opacity","1")
+        bd.className = ""
+        bd.classList.add("animate__animated","animate__backOutLeft")
+        setTimeout(() => {
+            bd.style.setProperty("opacity","0")
+            bd.className = ""
+        }, 1000);
+    }, 3000);
+
+    document.currentBullet += 1
+}
+
 var isMobile = (function () {let check = false;(function (a) {if (/(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows ce|xda|xiino/i.test(a) || /1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i.test(a.substr(0, 4))) check = true;})(navigator.userAgent || navigator.vendor || window.opera);return check;})()
 
 if (isMobile) {
diff --git a/src/package.json b/src/package.json
index edef8d0..f2d022f 100644
--- a/src/package.json
+++ b/src/package.json
@@ -1,6 +1,6 @@
 {
   "name": "nokia_5g_ppt",
-  "version": "1.2.5",
+  "version": "1.3.0",
   "description": "Nokia 5G PPT for duty report",
   "main": "main.js",
   "build": {