diff --git "a/DesignPattern/1-\345\215\225\344\276\213\346\250\241\345\274\217.md" "b/DesignPattern/1-\345\215\225\344\276\213\346\250\241\345\274\217.md"
index 3d643ac..cd0f9bd 100644
--- "a/DesignPattern/1-\345\215\225\344\276\213\346\250\241\345\274\217.md"
+++ "b/DesignPattern/1-\345\215\225\344\276\213\346\250\241\345\274\217.md"
@@ -506,7 +506,7 @@ const PRIVATE_KEY = Symbol();
 
 class ShoppingCartManagerJS {
   static #instance;
-  #products = [];
+  #products = new Map();
 
   constructor(key) {
     if (key !== PRIVATE_KEY) {
@@ -522,15 +522,20 @@ class ShoppingCartManagerJS {
   }
 
   add(name, quantity) {
-    this.#products.push({ name, quantity });
+    if(this.#products.has(name)){
+        this.#products.set(name, this.#products.get(name) + quantity);
+        return;
+    }else{
+        this.#products.set(name, quantity);
+    }
   }
 
   viewCart() {
-    if (this.#products.length === 0) {
+    if (this.#products.size === 0) {
       return;
     }
-    this.#products.forEach((product) => {
-      console.log(`${product.name} ${product.quantity}`);
+    this.#products.forEach((quantity, name) => {
+      console.log(`${name} ${quantity}`);
     });
   }
 }