diff --git a/src/locales/zh-Hant.json b/src/locales/zh-Hant.json
index 12e097372..144ef5230 100644
--- a/src/locales/zh-Hant.json
+++ b/src/locales/zh-Hant.json
@@ -1003,7 +1003,7 @@
   "shopping_cart_empty_notice": "購物車是空的",
   "shopping_cart_empty_notice_button": "瀏覽書店",
   "shopping_cart_error_insufficient_balance": "餘額不足，你只有 {balance}",
-  "shopping_cart_list_coupon_title": "優惠（如適用）",
+  "shopping_cart_list_coupon_title": "優惠(如適用)",
   "shopping_cart_list_coupon_text": "將於下一步計算",
   "shopping_cart_list_header_item": "購物明細",
   "shopping_cart_list_header_price": "單價",
diff --git a/src/pages/shopping-cart/book.vue b/src/pages/shopping-cart/book.vue
index ccdc9a325..bbc225de5 100644
--- a/src/pages/shopping-cart/book.vue
+++ b/src/pages/shopping-cart/book.vue
@@ -79,7 +79,7 @@
           {{ $t('shopping_cart_list_coupon_title') }}
         </div>
         <div
-          class="col-span-3 sm:col-span-2 text-medium-gray text-[14px] font-200"
+          class="col-span-3 sm:col-span-2 text-medium-gray text-[14px] font-400"
         >
           {{ $t('shopping_cart_list_coupon_text') }}
         </div>
@@ -154,6 +154,9 @@ import { getNFTBookCartPurchaseLink } from '~/util/api';
 import nftMixin from '~/mixins/nft';
 import alertMixin from '~/mixins/alert';
 
+const CHRISTMAS_CAMPAIGN_MIN_SPEND = 9;
+const CHRISTMAS_CAMPAIGN_COUPON = 'XMASREAD';
+
 export default {
   name: 'ShoppingCartPage',
   filters: {
@@ -228,9 +231,32 @@ export default {
         return totalPrice + (unitPrice * item.quantity || 0);
       }, 0);
     },
+    totalItemPriceInUSD() {
+      return this.shoppingCartBookItems.reduce((totalPrice, item) => {
+        let itemPrice = 0;
+        if (item.collectionId) {
+          itemPrice = this.getNFTCollectionPriceByCollectionId(
+            item.collectionId
+          );
+        } else {
+          const edition = this.getNFTBookStorePriceByClassIdAndIndex(
+            item.productId,
+            item.classId ? item.priceIndex : undefined
+          );
+          itemPrice = edition?.price || 0;
+        }
+        return totalPrice + (itemPrice * item.quantity || 0);
+      }, 0);
+    },
     formattedFiatPrice() {
       return formatNumberWithUSD(this.totalNFTPriceInUSD);
     },
+    getApplicableCoupon() {
+      if (this.coupon) return this.coupon;
+      return this.totalItemPriceInUSD > CHRISTMAS_CAMPAIGN_MIN_SPEND
+        ? CHRISTMAS_CAMPAIGN_COUPON
+        : '';
+    },
   },
   mounted() {
     logPurchaseFlowEvent(this, 'view_cart', this.purchaseEventParams);
@@ -361,7 +387,7 @@ export default {
             fbClickId: this.fbClickId,
             items: this.shoppingCartBookItems,
             email: this.walletEmail,
-            coupon: this.coupon || 'CHRISTMAS10',
+            coupon: this.getApplicableCoupon,
             giftInfo,
           },
           {