diff --git a/backend/README.md b/backend/README.md
index 468ed49..a9636d4 100644
--- a/backend/README.md
+++ b/backend/README.md
@@ -1,4 +1,4 @@
-curl -X POST "http//127.0.0.1:20000/user/register" \
+curl -X POST "http://127.0.0.1:20000/user/register" \
   -H "Content-Type: application/json" \
   -d '{
     "account": "test",
@@ -6,47 +6,47 @@ curl -X POST "http//127.0.0.1:20000/user/register" \
   }'
 ---
 # 创建美国
-curl -X POST "http//127.0.0.1:20000/country/create" \
+curl -X POST "http://127.0.0.1:20000/country/create" \
   -H "Content-Type: application/json" \
   -d '{"name": "美国", "code": "US"}'
 
 # 创建中国
-curl -X POST "http//127.0.0.1:20000/country/create" \
+curl -X POST "http://127.0.0.1:20000/country/create" \
   -H "Content-Type: application/json" \
   -d '{"name": "中国", "code": "CN"}'
 
 # 创建日本
-curl -X POST "http//127.0.0.1:20000/country/create" \
+curl -X POST "http://127.0.0.1:20000/country/create" \
   -H "Content-Type: application/json" \
   -d '{"name": "日本", "code": "JP"}'
 
 # 创建香港
-curl -X POST "http//127.0.0.1:20000/country/create" \
+curl -X POST "http://127.0.0.1:20000/country/create" \
   -H "Content-Type: application/json" \
   -d '{"name": "香港", "code": "HK"}'
 ---
 # 创建美国
-curl -X POST "http//127.0.0.1:20000/currency/create" \
+curl -X POST "http://127.0.0.1:20000/currency/create" \
   -H "Content-Type: application/json" \
   -d '{"name": "美元", "code": "USD"}'
 
 # 创建中国
-curl -X POST "http//127.0.0.1:20000/currency/create" \
+curl -X POST "http://127.0.0.1:20000/currency/create" \
   -H "Content-Type: application/json" \
   -d '{"name": "人民币", "code": "CNY"}'
 
 # 创建日本
-curl -X POST "http//127.0.0.1:20000/currency/create" \
+curl -X POST "http://127.0.0.1:20000/currency/create" \
   -H "Content-Type: application/json" \
   -d '{"name": "日元", "code": "JPY"}'
 
 # 创建香港
-curl -X POST "http//127.0.0.1:20000/currency/create" \
+curl -X POST "http://127.0.0.1:20000/currency/create" \
   -H "Content-Type: application/json" \
   -d '{"name": "港币", "code": "HKD"}'
 ---
 # 创建郑州商品交易所
-curl -X POST http//127.0.0.1:20000/exchange/create \
+curl -X POST http://127.0.0.1:20000/exchange/create \
   -H "Content-Type: application/json" \
   -d '{
     "name": "郑州商品交易所",
@@ -55,7 +55,7 @@ curl -X POST http//127.0.0.1:20000/exchange/create \
   }'
 
 # 创建上海证券交易所
-curl -X POST http//127.0.0.1:20000/exchange/create \
+curl -X POST http://127.0.0.1:20000/exchange/create \
   -H "Content-Type: application/json" \
   -d '{
     "name": "上海证券交易所",
@@ -64,7 +64,7 @@ curl -X POST http//127.0.0.1:20000/exchange/create \
   }'
 
 # 创建深圳证券交易所
-curl -X POST http//127.0.0.1:20000/exchange/create \
+curl -X POST http://127.0.0.1:20000/exchange/create \
   -H "Content-Type: application/json" \
   -d '{
     "name": "深圳证券交易所",
@@ -73,7 +73,7 @@ curl -X POST http//127.0.0.1:20000/exchange/create \
   }'
 
 # 创建上海期货交易所
-curl -X POST http//127.0.0.1:20000/exchange/create \
+curl -X POST http://127.0.0.1:20000/exchange/create \
   -H "Content-Type: application/json" \
   -d '{
     "name": "上海期货交易所",
@@ -82,7 +82,7 @@ curl -X POST http//127.0.0.1:20000/exchange/create \
   }'
 
 # 创建中国金融期货交易所
-curl -X POST http//127.0.0.1:20000/exchange/create \
+curl -X POST http://127.0.0.1:20000/exchange/create \
   -H "Content-Type: application/json" \
   -d '{
     "name": "中国金融期货交易所",
@@ -91,7 +91,7 @@ curl -X POST http//127.0.0.1:20000/exchange/create \
   }'
 
   # 创建大连商品期货交易所
-curl -X POST http//127.0.0.1:20000/exchange/create \
+curl -X POST http://127.0.0.1:20000/exchange/create \
   -H "Content-Type: application/json" \
   -d '{
     "name": "大连商品交易所",
@@ -100,7 +100,7 @@ curl -X POST http//127.0.0.1:20000/exchange/create \
   }'
 
 # 创建广州期货交易所
-curl -X POST http//127.0.0.1:20000/exchange/create \
+curl -X POST http://127.0.0.1:20000/exchange/create \
   -H "Content-Type: application/json" \
   -d '{
     "name": "广州期货交易所",
@@ -109,7 +109,7 @@ curl -X POST http//127.0.0.1:20000/exchange/create \
   }'
 
 # 创建上海国际能源交易中心
-curl -X POST http//127.0.0.1:20000/exchange/create \
+curl -X POST http://127.0.0.1:20000/exchange/create \
   -H "Content-Type: application/json" \
   -d '{
     "name": "上海国际能源交易中心",