diff --git a/xy_sh/internal/biz/biz.go b/xy_sh/internal/biz/biz.go
new file mode 100644
index 0000000..409be57
--- /dev/null
+++ b/xy_sh/internal/biz/biz.go
@@ -0,0 +1,186 @@
+package biz
+
+import (
+	"crypto/rand"
+	"encoding/hex"
+	"errors"
+	"io"
+	"strconv"
+	"sync"
+	"time"
+
+	"xy_sh/internal/entities"
+)
+
+type OrderStore struct {
+	mu     sync.RWMutex
+	orders map[string]*OrderInfo
+}
+
+type OrderInfo struct {
+	OrderNo     string
+	ActOrderNum string
+	GoodsCode   string
+	ActCode     string
+	Account     string
+	Status      int
+	CouponNo    string
+	CouponCode  string
+	ExpireTime  string
+	CouponId    string
+	AppId       string
+	OpenId      string
+	CreateTime  time.Time
+	UpdateTime  time.Time
+}
+
+var store *OrderStore
+
+func init() {
+	store = &OrderStore{
+		orders: make(map[string]*OrderInfo),
+	}
+}
+
+func CreateOrder(req *entities.OrderRequest) (*entities.OrderResponseData, error) {
+	store.mu.Lock()
+	defer store.mu.Unlock()
+
+	orderNo := generateOrderNo()
+
+	orderInfo := &OrderInfo{
+		OrderNo:     orderNo,
+		ActOrderNum: req.ActOrderNum,
+		GoodsCode:   req.GoodsCode,
+		ActCode:     req.ActCode,
+		Account:     req.Account,
+		Status:      entities.StatusSuccess,
+		CreateTime:  time.Now(),
+		UpdateTime:  time.Now(),
+	}
+
+	orderInfo.CouponNo = generateCouponNo()
+	orderInfo.CouponCode = orderInfo.CouponNo
+	orderInfo.ExpireTime = time.Now().AddDate(1, 0, 0).Format("2006-01-02 15:04:05")
+
+	store.orders[orderNo] = orderInfo
+
+	return &entities.OrderResponseData{
+		OrderNo:    orderNo,
+		CouponNo:   orderInfo.CouponNo,
+		CouponCode: orderInfo.CouponCode,
+		Status:     orderInfo.Status,
+		ExpireTime: orderInfo.ExpireTime,
+	}, nil
+}
+
+func QueryOrder(req *entities.QueryOrderRequest) (*entities.QueryOrderResponseData, error) {
+	store.mu.RLock()
+	defer store.mu.RUnlock()
+
+	orderInfo, exists := store.orders[req.OrderNo]
+	if !exists {
+		return nil, errors.New("订单不存在")
+	}
+
+	resp := &entities.QueryOrderResponseData{
+		OrderNo:  orderInfo.OrderNo,
+		Status:   orderInfo.Status,
+		Account:  orderInfo.Account,
+		CouponId: orderInfo.CouponId,
+	}
+
+	if orderInfo.CouponNo != "" {
+		resp.CardInfo = &entities.CardInfo{
+			CouponNo:   orderInfo.CouponNo,
+			CouponCode: orderInfo.CouponCode,
+			ExpireTime: orderInfo.ExpireTime,
+		}
+	}
+
+	return resp, nil
+}
+
+func WxRecharge(req *entities.WxRechargeRequest) (*entities.WxRechargeResponseData, error) {
+	store.mu.Lock()
+	defer store.mu.Unlock()
+
+	if orderInfo, exists := store.orders[req.OrderNo]; exists {
+		return &entities.WxRechargeResponseData{
+			OrderNo:  orderInfo.OrderNo,
+			Status:   orderInfo.Status,
+			CouponId: orderInfo.CouponId,
+		}, nil
+	}
+
+	orderNo := req.OrderNo
+
+	orderInfo := &OrderInfo{
+		OrderNo:     orderNo,
+		ActOrderNum: req.ActOrderNum,
+		GoodsCode:   req.GoodsCode,
+		ActCode:     req.ActCode,
+		AppId:       req.AppId,
+		OpenId:      req.OpenId,
+		Status:      entities.StatusSuccess,
+		CouponId:    generateCouponId(),
+		CreateTime:  time.Now(),
+		UpdateTime:  time.Now(),
+	}
+
+	store.orders[orderNo] = orderInfo
+
+	return &entities.WxRechargeResponseData{
+		OrderNo:  orderNo,
+		Status:   orderInfo.Status,
+		CouponId: orderInfo.CouponId,
+	}, nil
+}
+
+func HandleCallback(req *entities.CallbackRequest) error {
+	store.mu.Lock()
+	defer store.mu.Unlock()
+
+	orderInfo, exists := store.orders[req.OrderNo]
+	if !exists {
+		orderInfo = &OrderInfo{
+			OrderNo:     req.OrderNo,
+			ActOrderNum: req.ActOrderNum,
+			CreateTime:  time.Now(),
+		}
+		store.orders[req.OrderNo] = orderInfo
+	}
+
+	orderInfo.Status = req.Status
+	orderInfo.Account = req.Account
+	orderInfo.CouponId = req.CouponId
+	orderInfo.UpdateTime = time.Now()
+
+	if req.CardInfo != nil {
+		orderInfo.CouponNo = req.CardInfo.CouponNo
+		orderInfo.CouponCode = req.CardInfo.CouponCode
+		orderInfo.ExpireTime = req.CardInfo.ExpireTime
+	}
+
+	return nil
+}
+
+func generateOrderNo() string {
+	return "HM" + strconv.FormatInt(time.Now().UnixMilli(), 10) + randomString(16)
+}
+
+func generateCouponNo() string {
+	return randomString(16)
+}
+
+func generateCouponId() string {
+	return randomString(8)
+}
+
+func randomString(n int) string {
+	b := make([]byte, (n+1)/2)
+	if _, err := io.ReadFull(rand.Reader, b); err != nil {
+		panic(err)
+	}
+	return hex.EncodeToString(b)[:n]
+}
\ No newline at end of file