diff --git a/constants/invoice_html.go b/constants/invoice_html.go
index 1255fc8b..d6181ef1 100644
--- a/constants/invoice_html.go
+++ b/constants/invoice_html.go
@@ -1 +1,284 @@
 package constants
+
+const INVOICE_TEMPLATE = `      
+<!DOCTYPE html>
+<html lang="en">
+
+<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">
+    <title>Invoice</title>
+    <style>
+        @font-face {
+            font-family: "Montserrat-SemiBold";
+            src: url("https://s3.us-west-1.amazonaws.com/storage.fusenpack.com/b808164b4f7ecc19f560d235db5b1f5b99fe8ab218b606f15debab2b9c4230e2");
+        }
+
+        @font-face {
+            font-family: "Montserrat-Medium";
+            src: url("https://s3.us-west-1.amazonaws.com/storage.fusenpack.com/3d91bbd91ba6fac26b8460a078742b61bfd1e2976311c065f8ac9c5270be6901");
+        }
+
+        @font-face {
+            font-family: "Montserrat-Light";
+            src: url("https://s3.us-west-1.amazonaws.com/storage.fusenpack.com/24e580a4a5afebf94596ec7b6c8d9c8d57f75a5429ee757217da552d5f03e5d1");
+        }
+
+        @font-face {
+            font-family: "Montserrat-Regular";
+            src: url("https://s3.us-west-1.amazonaws.com/storage.fusenpack.com/78072d2cbce0a3f88c01ab2830ba3a453f0968b516388e45e9a6fb5e970450b8");
+        }
+
+        body {
+            margin: 0;
+        }
+
+        .header_warp {
+            background-color: #F8F8FA;
+            padding: 20px 5% 20px 6%;
+        }
+
+        .header_td {
+            width: 50%;
+            font-family: Montserrat-SemiBold;
+        }
+
+        .header_td.logo {
+            vertical-align: top;
+        }
+
+        .header_logo {
+            max-height: 15px;
+            max-width: 100%;
+            margin-top: 5px;
+        }
+
+        .header_td.title {
+            color: #212121;
+            font-weight: 600;
+            font-size: 36px;
+        }
+
+        .information_warp {
+            padding: 30px 5% 30px 6%;
+        }
+
+        .information_td {
+            width: 50%;
+            font-size: 13px;
+            line-height: 20px;
+            font-weight: 300;
+            font-family: Montserrat-Light;
+        }
+
+        .information_td.bill {
+            color: #212121;
+            font-weight: 500;
+            font-family: Montserrat-Medium;
+        }
+
+        .information_td.right {
+            color: #212121;
+        }
+
+        .information_td.info {
+            color: #666666;
+            line-height: 17px;
+        }
+
+        .bill_warp {
+            padding: 0 5% 0 6%;
+        }
+
+        .bill_td {
+            font-size: 13px;
+        }
+
+        .bill_td:first-child {
+            width: 47.59%;
+        }
+
+        .bill_td.title {
+            border-top: 2px solid #333;
+            padding: 13px 0 7px;
+            font-weight: 500;
+            color: #212121;
+            font-family: Montserrat-Medium;
+        }
+
+        .bill_td.info {
+            color: #666;
+            border-bottom: 1px solid #ccc;
+            padding: 8px 0;
+            font-weight: 400;
+            font-family: Montserrat-Light;
+        }
+
+        .bill_td.info:first-child {
+            font-family: Montserrat-Regular;
+        }
+
+        .bill_warp tr:last-child .bill_td.info {
+            border-bottom: none;
+        }
+
+        .total_warp {
+            padding: 14px 5% 24px 0;
+        }
+
+        .total_td {
+            color: #212121;
+            padding: 8px 0 7px;
+            font-size: 12px;
+            font-weight: 500;
+            font-family: Montserrat-Medium;
+        }
+
+        .total_td.info {
+            color: #666;
+            font-weight: 400;
+            font-family: Montserrat-Regular;
+        }
+
+        .total_td.border-dashed {
+            border-bottom: 1px dashed #ccc;
+        }
+
+        .total_td.border-solid {
+            border-bottom: 2px solid #333;
+            padding-bottom: 12px;
+        }
+
+        .total_td.total {
+            padding-top: 12px;
+            font-size: 13px;
+            font-weight: 600;
+            font-family: Montserrat-SemiBold;
+        }
+
+        .notes_warp {
+            padding: 0 5% 0 6%;
+        }
+
+        .notes_td {
+            font-size: 13px;
+            color: #666;
+            font-weight: 300;
+            width: 50%;
+            line-height: 21px;
+            font-family: Montserrat-Light;
+        }
+
+        .notes_td.title {
+            color: #212121;
+            font-weight: 500;
+            font-family: Montserrat-Medium;
+        }
+
+        .notes_td.notes {
+            vertical-align: top;
+        }
+    </style>
+</head>
+
+<body>
+    <!-- header -->
+    <table class="header_warp" border="0" align="center" cellpadding="0" cellspacing="0" width="100%">
+        <tr>
+            <td class="header_td logo" align="left">
+                <img class="header_logo" src="https://fusenapi.kayue.cn:8010/storage/email/logo.png" alt="logo">
+            </td>
+            <td class="header_td title" align="right">Invoice</td>
+        </tr>
+    </table>
+    <!-- information -->
+    <table class="information_warp" border="0" align="center" cellpadding="0" cellspacing="0" width="100%">
+        <tr>
+            <td class="information_td bill" align="left">Bill To:</td>
+            <td class="information_td right" align="right">Invoice No. #20220562040</td>
+        </tr>
+        <tr>
+            <td class="information_td info" align="left">Timmy Turner</td>
+            <td class="information_td right" align="right">Date: 2023/12/04</td>
+        </tr>
+        <tr>
+            <td class="information_td info" align="left">North Street</td>
+            <td class="information_td" align="right"></td>
+        </tr>
+        <tr>
+            <td class="information_td info" align="left">London, SE20 3JW</td>
+            <td class="information_td" align="right"></td>
+        </tr>
+        <tr>
+            <td class="information_td info" align="left">United Kingdom</td>
+            <td class="information_td" align="right"></td>
+        </tr>
+    </table>
+    <!-- bill -->
+    <table class="bill_warp" border="0" align="center" cellpadding="0" cellspacing="0" width="100%">
+        <tr>
+            <td class="bill_td title" align="left">Product Name</td>
+            <td class="bill_td title" align="right">Price</td>
+            <td class="bill_td title" align="right">Quantity</td>
+            <td class="bill_td title" align="right">Total</td>
+        </tr>
+        <tr>
+            <td class="bill_td info" align="left">Plastic bowl</td>
+            <td class="bill_td info" align="right">$01.00</td>
+            <td class="bill_td info" align="right">20,000 Units</td>
+            <td class="bill_td info" align="right">$99.00</td>
+        </tr>
+        <tr>
+            <td class="bill_td info" align="left">Paper bag with handlexxxxxxxxxxxxxxx second line</td>
+            <td class="bill_td info" align="right">$01.00</td>
+            <td class="bill_td info" align="right">20,000 Units</td>
+            <td class="bill_td info" align="right">$99.00</td>
+        </tr>
+    </table>
+    <!-- total -->
+    <table class="total_warp" border="0" align="right" cellpadding="0" cellspacing="0" width="50%">
+        <tr>
+            <td class="total_td" align="right">Subtotal</td>
+            <td class="total_td info" align="right">$198.00</td>
+        </tr>
+        <tr>
+            <td class="total_td" align="right">Shipping Fee</td>
+            <td class="total_td info" align="right">Free</td>
+        </tr>
+        <tr>
+            <td class="total_td border-dashed" align="right">Tax</td>
+            <td class="total_td info border-dashed" align="right">$0.00</td>
+        </tr>
+        <tr>
+            <td class="total_td" align="right">Total</td>
+            <td class="total_td info" align="right">$198.00</td>
+        </tr>
+        <tr>
+            <td class="total_td border-solid" align="right">Deposit Requested</td>
+            <td class="total_td info border-solid" align="right">$99.00</td>
+        </tr>
+        <tr>
+            <td class="total_td total" align="right">Deposit Due</td>
+            <td class="total_td total" align="right">$99.00</td>
+        </tr>
+    </table>
+    <!-- notes -->
+    <table class="notes_warp" border="0" align="center" cellpadding="0" cellspacing="0" width="100%">
+        <tr>
+            <td class="notes_td title" align="left">Payment Method:</td>
+            <td class="notes_td title" align="left">Notes:</td>
+        </tr>
+        <tr>
+            <td class="notes_td" align="left">ICBC</td>
+            <td class="notes_td notes" align="left" rowspan="2">Thank you for your business !</td>
+        </tr>
+        <tr>
+            <td class="notes_td" align="left">Account No. :****4589</td>
+        </tr>
+    </table>
+</body>
+
+</html>
+
+    `

Bill To:	Invoice No. #20220562040
Timmy Turner	Date: 2023/12/04
North Street
London, SE20 3JW
United Kingdom
Product Name	Price	Quantity	Total
Plastic bowl	$01.00	20,000 Units	$99.00
Paper bag with handlexxxxxxxxxxxxxxx second line	$01.00	20,000 Units	$99.00
Subtotal	$198.00
Shipping Fee	Free
Tax	$0.00
Total	$198.00
Deposit Requested	$99.00
Deposit Due	$99.00
Payment Method:	Notes:
ICBC	Thank you for your business !
Account No. :****4589	Thank you for your business !