diff --git a/L414-5KR-impurities.html b/L414-5KR-impurities.html
new file mode 100644
index 0000000..8845499
--- /dev/null
+++ b/L414-5KR-impurities.html
@@ -0,0 +1,210 @@
+<!DOCTYPE html>
+<html lang="zh-cmn-Hans">
+
+<head>
+    <meta charset="UTF-8">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
+    <title>L414-5KR 相关物质计算</title>
+    <link rel="stylesheet" href="./github.css">
+    <link rel="stylesheet" href="./theme.css">
+    <script src="./decimal.js"></script>
+    <script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
+    <script>
+        var debug = false
+
+        // 校正因子
+        var F_L414_3 = new Decimal(0.80)
+        var F_L414_5_IM = new Decimal(1.48)
+        // 计算精度
+        var PRECISION = 3
+        // 操规允许的最大值
+        var MAX_L414_3 = 0.3
+        var MAX_L414_5_IM = 1.0
+        var MAX_TOTAL_IMPURITIES = 2.0
+        var MIN_PURITY = 98.0
+
+
+        // 默认的消息提示
+        var tips = `计算 L414-3、L414-5-IM、杂质总量、纯度`
+
+        var decimal = Decimal.set({
+            rounding: Decimal.ROUND_HALF_EVEN,
+            precision: 12
+        });
+
+        $(document).ready(() => {
+            let one_all = $("#one-all")
+            let one_414_3 = $("#one-414-3")
+            let one_414_5_im = $("#one-414-5-im")
+            let one_414_5 = $("#one-414-5")
+            let two_all = $("#two-all")
+            let two_414_3 = $("#two-414-3")
+            let two_414_5_im = $("#two-414-5-im")
+            let two_414_5 = $("#two-414-5")
+
+            if (debug) {
+                one_414_3.val(1762)
+                one_414_5_im.val(2614)
+                one_414_5.val(24001626)
+                one_all.val(24075340)
+
+                two_414_3.val(2175)
+                two_414_5_im.val(3319)
+                two_414_5.val(24320630)
+                two_all.val(24409434)
+            }
+
+            setCheckInputEvent()
+            $("#msgbox").html(tips)
+            $("#new_page").click(() => window.open(window.location.href, "_BLANK"))
+            $("#clear").click(() => {
+                one_all.val("")
+                two_all.val("")
+                one_414_3.val("")
+                two_414_3.val("")
+                one_414_5_im.val("")
+                two_414_5_im.val("")
+                one_414_5.val("")
+                two_414_5.val("")
+                $("#msgbox").empty()
+                $("#msgbox").html(tips)
+            })
+            $("#ok").click(() => {
+                let one_414_3_cf = correctionFactor(one_414_3.val(), one_all.val(), F_L414_3)
+                let one_414_5_im_cf = correctionFactor(one_414_5_im.val(), one_all.val(), F_L414_5_IM)
+
+                let two_414_3_cf = correctionFactor(two_414_3.val(), two_all.val(), F_L414_3)
+                let two_414_5_im_cf = correctionFactor(two_414_5_im.val(), two_all.val(), F_L414_5_IM)
+
+                let one_total_impurities = totalImpurities(
+                    one_all.val(), one_414_5.val(),
+                    one_414_3.val(), one_414_3_cf,
+                    one_414_5_im.val(), one_414_5_im_cf
+                )
+
+                let two_total_impurities = totalImpurities(
+                    two_all.val(), two_414_5.val(),
+                    two_414_3.val(), two_414_3_cf,
+                    two_414_5_im.val(), two_414_5_im_cf
+                )
+
+                let msg = `
+                第一组结果: <br>
+                L414-3: ${format(one_414_3_cf, MAX_L414_3)} <br>
+                L414-5-IM: ${format(one_414_5_im_cf, MAX_L414_5_IM)} <br>
+                总杂: ${format(one_total_impurities, MAX_TOTAL_IMPURITIES)} <br>
+                纯度: ${format(decimal.sub(100, one_total_impurities), MIN_PURITY, true)} <br>
+
+                <br>
+                第二组结果: <br>
+                L414-3: ${format(two_414_3_cf, MAX_L414_3)} <br>
+                L414-5-IM: ${format(two_414_5_im_cf, MAX_L414_5_IM)} <br>
+                总杂: ${format(two_total_impurities, MAX_TOTAL_IMPURITIES)} <br>
+                纯度: ${format(decimal.sub(100, two_total_impurities), MIN_PURITY, true)} <br>
+
+                <br>
+                平均值: <br>
+                L414-3: ${format(average(one_414_3_cf, two_414_3_cf), MAX_L414_3)} <br>
+                L414-5-IM: ${format(average(one_414_5_im_cf, two_414_5_im_cf), MAX_L414_5_IM)} <br>
+                总杂: ${format(average(one_total_impurities, two_total_impurities), MAX_TOTAL_IMPURITIES)} <br>
+                纯度: ${format(average(decimal.sub(100, one_total_impurities), decimal.sub(100, two_total_impurities), 1), MIN_PURITY, true)} <br>
+
+                <br>
+                操规允许: <br>
+                L414-3 &le; ${MAX_L414_3}% <br>
+                L414-5-IM &le; ${MAX_L414_5_IM.toPrecision(2)}% <br>
+                总杂 &le; ${MAX_TOTAL_IMPURITIES.toPrecision(2)}% <br>
+                纯度 &ge; ${MIN_PURITY}% <br>
+                `
+
+                $("#msgbox").html(msg)
+            })
+        })
+
+        function setCheckInputEvent() {
+            let checkInput = (event) => {
+                event.target.value = event.target.value.replace(/[0-9]/g, '')
+            }
+            $("#one-all").on("input", checkInput)
+            $("#one-414-3").on("input", checkInput)
+            $("#one-414-5-im").on("input", checkInput)
+            $("#one-414-5").on("input", checkInput)
+            $("#two-all").on("input", checkInput)
+            $("#two-414-3").on("input", checkInput)
+            $("#two-414-5-im").on("input", checkInput)
+            $("#two-414-5").on("input", checkInput)
+        }
+
+        /**
+         * 代入校正因子进行计算
+         */
+        function correctionFactor(pa, paa, f) {
+            if (pa == '' || paa == '' || f == '') return 0
+            return decimal.div(pa, paa).mul(f).mul(100).toFixed(PRECISION, Decimal.ROUND_HALF_EVEN)
+        }
+
+        /**
+         * 计算杂质总量
+         */
+        function totalImpurities(paa, l414_5, l414_3, l414_3_rrf, l414_5_im, l414_5_im_rrf) {
+            if (paa == '' || l414_5 == '' || l414_3 == '' || l414_3_rrf == '' ||
+                l414_5_im == '' || l414_5_im_rrf == '') return 0
+
+            // X = All - (L414-5) - (L414-3) - (L414-5-IM) / All * 100
+            // R = X + (%L414-3) + (%L414-5-IM)
+            let a = decimal.sub(paa, l414_5).sub(l414_3).sub(l414_5_im)
+            let b = decimal.div(a, paa).mul(100)
+            let r = decimal.add(b, l414_3_rrf).add(l414_5_im_rrf)
+            return r.toFixed(PRECISION, Decimal.ROUND_HALF_EVEN)
+        }
+
+        function format(value, max, morethen = false) {
+            let red_value = `<span style='color: red;'>${value}%</span>`
+            if (value == 0) return "ND"
+            if (value < 0) return red_value
+            if (!morethen && value >= max) return red_value
+            if (morethen && value <= max) return red_value
+            return `${value}%`
+        }
+
+        /**
+         * 求两个数的平均值
+         */
+        function average(a, b, fd = (PRECISION - 1)) {
+            return decimal.add(a, b).div(2).toFixed(fd)
+        }
+    </script>
+</head>
+
+<body>
+    <h3>L414-5KR 相关物质计算</h3>
+    <div class="one">
+        第一组<br>
+        <input type="number" name="one-414-3" id="one-414-3" , placeholder="L414-3 峰面积" inputmode="numeric">
+        <input type="number" name="one-414-5-im" id="one-414-5-im" , placeholder="L414-5-IM 峰面积" inputmode="numeric">
+        <input type="number" name="one-414-5" id="one-414-5" , placeholder="L414-5 峰面积" inputmode="numeric">
+        <input type="number" name="one-all" id="one-all" placeholder="总峰面积" inputmode="numeric">
+    </div>
+
+    <br>
+    <div class="two">
+        第二组<br>
+        <input type="number" name="two-414-3" id="two-414-3" , placeholder="L414-3 峰面积" inputmode="numeric">
+        <input type="number" name="two-414-5-im" id="two-414-5-im" , placeholder="L414-5-IM 峰面积" inputmode="numeric">
+        <input type="number" name="two-414-5" id="two-414-5" , placeholder="L414-5 峰面积" inputmode="numeric">
+        <input type="number" name="two-all" id="two-all" placeholder="总峰面积" inputmode="numeric">
+    </div>
+
+    <br>
+    <div class="buttons">
+        <button id="new_page">新开标签页</button>
+        <button id="clear">清除内容</button>
+        <button id="ok">计算</button>
+    </div>
+
+    <br>
+    <div id="msgbox"></div>
+</body>
+
+</html>
diff --git a/index.html b/index.html
index 2871453..4144bbd 100644
--- a/index.html
+++ b/index.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html lang="zh_CN">
+<html lang="zh-cmn-Hans">
 
 <head>
     <meta charset="UTF-8">
@@ -8,7 +8,7 @@
     <link rel="stylesheet" href="./theme.css">
     <script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
     <script>
-        let url = "https://api.github.com/repos/hbk01/hbk01.github.io/commits?per_page=5";
+        let url = "https://api.github.com/repos/hbk01/hbk01.github.io/commits?per_page=10";
 
         let functions = [
             {
@@ -30,11 +30,17 @@
             {
                 "name": "设备信息",
                 "location": "./equipment.html"
+            },
+            {
+                "name": "L414-5KR 相关物质计算",
+                "location": "./L414-5KR-impurities.html"
             }
         ];
 
         $(document).ready(() => {
 
+            var getRandomColor = () => '#' + (Math.random() * 0xffffff << 0).toString(16)
+
             // 加载功能列表
             functions.forEach(value => {
                 let div = `<div class="item" onclick="window.location.href='${value.location}'">${value.name}</div>`;
@@ -43,13 +49,19 @@
 
             // 加载最近的 commit 记录
             $.getJSON(url, data => {
+                let color1 = getRandomColor()
+                let color2 = getRandomColor()
+                let changeColor = false
                 data.forEach(element => {
                     let message = element.commit.message.replace("\n", "<br>");
                     if (message.startsWith("+")) {
-                        message = message.replace("+", "");
+                        message = message.replace("+", "<br>&nbsp;&nbsp;&bull;");
                     }
+                    message = message.replace("+", "&nbsp;&nbsp;&bull;")
                     let time = element.commit.committer.date.slice(0, 10);
-                    $(".changelog").append(`${time}: ${message}<br>`);
+                    changeColor = !changeColor
+                    let msg = `<span style="color: ${changeColor ? color1 : color2}">${time}: ${message}</span><br>`
+                    $(".changelog").append(msg);
                 });
             });
         });
@@ -62,6 +74,7 @@
     <div class="list"></div>
     <h4>关于</h4>
     <div class="about">
+        <p>建议使用系统自带浏览器，以完善使用体验！</p>
         本项目开源于
         <a href="https://github.com/hbk01/hbk01.github.io">Github</a> ，并由
         <a href="https://docs.github.com/en/pages">Github Pages</a> 提供页面构建及部署服务。
