diff --git a/ymt_v3_2/valid.md b/ymt_v3_2/valid.md
new file mode 100644
index 0000000..0920e90
--- /dev/null
+++ b/ymt_v3_2/valid.md
@@ -0,0 +1,695 @@
+// File: ymt_v3_2/go.mod
+```go
+module ymt_v3_2
+
+go 1.21
+```
+
+// File: ymt_v3_2/client.go
+```go
+package ymt_v3_2
+
+import (
+	"bytes"
+	"context"
+	"crypto/rsa"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"time"
+)
+
+type Client struct {
+	httpClient *http.Client
+	baseURL    string
+	appID      string
+	privateKey *rsa.PrivateKey
+	publicKey  *rsa.PublicKey
+	aesKey     []byte
+	signType   string
+}
+
+type Option func(*Client)
+
+func WithBaseURL(url string) Option {
+	return func(c *Client) {
+		c.baseURL = url
+	}
+}
+
+func WithTimeout(d time.Duration) Option {
+	return func(c *Client) {
+		c.httpClient.Timeout = d
+	}
+}
+
+func WithHTTPClient(client *http.Client) Option {
+	return func(c *Client) {
+		c.httpClient = client
+	}
+}
+
+func WithAppID(appID string) Option {
+	return func(c *Client) {
+		c.appID = appID
+	}
+}
+
+func WithPrivateKeyPEM(pemData string) Option {
+	return func(c *Client) {
+		key, err := parsePrivateKey(pemData)
+		if err != nil {
+			panic(fmt.Sprintf("failed to parse private key: %v", err))
+		}
+		c.privateKey = key
+	}
+}
+
+func WithPublicKeyPEM(pemData string) Option {
+	return func(c *Client) {
+		key, err := parsePublicKey(pemData)
+		if err != nil {
+			panic(fmt.Sprintf("failed to parse public key: %v", err))
+		}
+		c.publicKey = key
+	}
+}
+
+func WithAESKey(key string) Option {
+	return func(c *Client) {
+		c.aesKey = []byte(key)
+	}
+}
+
+func WithSignType(signType string) Option {
+	return func(c *Client) {
+		c.signType = signType
+	}
+}
+
+func NewClient(opts ...Option) *Client {
+	c := &Client{
+		httpClient: &http.Client{Timeout: 30 * time.Second},
+		baseURL:    "https://gateway.dev.cdlsxd.cn",
+		signType:   "RSA",
+	}
+	for _, opt := range opts {
+		opt(c)
+	}
+	return c
+}
+
+func (c *Client) Do(ctx context.Context, method, path string, bizReq interface{}, bizResp interface{}) error {
+	plaintext, err := marshalSortedNoZero(bizReq)
+	if err != nil {
+		return fmt.Errorf("marshal request: %w", err)
+	}
+
+	ciphertext, err := aesEncryptECB(plaintext, c.aesKey)
+	if err != nil {
+		return fmt.Errorf("encrypt: %w", err)
+	}
+
+	timestamp := time.Now().Format("2006-01-02 15:04:05")
+
+	signStr := c.appID + timestamp + ciphertext
+	sign, err := rsaSign([]byte(signStr), c.privateKey)
+	if err != nil {
+		return fmt.Errorf("sign: %w", err)
+	}
+
+	reqBody := cipherRequest{Ciphertext: ciphertext}
+	bodyBytes, err := json.Marshal(reqBody)
+	if err != nil {
+		return fmt.Errorf("marshal request body: %w", err)
+	}
+
+	url := c.baseURL + path
+	req, err := http.NewRequestWithContext(ctx, method, url, bytes.NewReader(bodyBytes))
+	if err != nil {
+		return fmt.Errorf("create request: %w", err)
+	}
+	req.Header.Set("Appid", c.appID)
+	req.Header.Set("Timestamp", timestamp)
+	req.Header.Set("Sign", sign)
+	req.Header.Set("Content-Type", "application/json")
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return fmt.Errorf("http request: %w", err)
+	}
+	defer resp.Body.Close()
+
+	respBytes, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return fmt.Errorf("read response: %w", err)
+	}
+
+	var commonResp commonResponse
+	if err := json.Unmarshal(respBytes, &commonResp); err != nil {
+		return fmt.Errorf("unmarshal response: %w", err)
+	}
+
+	if commonResp.Code != 200 {
+		return &APIError{
+			Code:    commonResp.Code,
+			Message: commonResp.Message,
+			Reason:  commonResp.Reason,
+		}
+	}
+
+	if len(commonResp.Data) == 0 {
+		return nil
+	}
+
+	var cd cipherData
+	if err := json.Unmarshal(commonResp.Data, &cd); err == nil && cd.Ciphertext != "" {
+		decrypted, err := aesDecryptECB(cd.Ciphertext, c.aesKey)
+		if err != nil {
+			return fmt.Errorf("decrypt response: %w", err)
+		}
+		if err := json.Unmarshal(decrypted, bizResp); err != nil {
+			return fmt.Errorf("unmarshal decrypted response: %w", err)
+		}
+	} else {
+		if err := json.Unmarshal(commonResp.Data, bizResp); err != nil {
+			return fmt.Errorf("unmarshal plain data: %w", err)
+		}
+	}
+
+	return nil
+}
+
+type cipherRequest struct {
+	Ciphertext string `json:"ciphertext"`
+}
+
+type commonResponse struct {
+	Code    int32           `json:"code"`
+	Message string          `json:"message"`
+	Reason  string          `json:"reason,omitempty"`
+	Data    json.RawMessage `json:"data,omitempty"`
+}
+
+type cipherData struct {
+	Ciphertext string `json:"ciphertext"`
+}
+```
+
+// File: ymt_v3_2/types.go
+```go
+package ymt_v3_2
+
+type GetKeyRequest struct {
+	OutBizNo   string `json:"out_biz_no"`
+	ActivityNo string `json:"activity_no"`
+	Account    string `json:"account,omitempty"`
+	NotifyURL  string `json:"notify_url,omitempty"`
+}
+
+type GetKeyResponse struct {
+	OutBizNo        string  `json:"out_biz_no"`
+	TradeNo         string  `json:"trade_no"`
+	Key             string  `json:"key,omitempty"`
+	URL             string  `json:"url,omitempty"`
+	ValidBeginTime  string  `json:"valid_begin_time,omitempty"`
+	ValidEndTime    string  `json:"valid_end_time,omitempty"`
+	UsableNum       uint32  `json:"usable_num"`
+	UsageNum        uint32  `json:"usage_num"`
+	Status          uint32  `json:"status"`
+	SettlementPrice float64 `json:"settlement_price,omitempty"`
+	Account         string  `json:"account,omitempty"`
+}
+
+type QueryKeyRequest struct {
+	OutBizNo string `json:"out_biz_no,omitempty"`
+	TradeNo  string `json:"trade_no,omitempty"`
+}
+
+type QueryKeyResponse = GetKeyResponse
+
+type DiscardKeyRequest struct {
+	OutBizNo string `json:"out_biz_no,omitempty"`
+	TradeNo  string `json:"trade_no,omitempty"`
+}
+
+type DiscardKeyResponse struct {
+	OutBizNo string `json:"out_biz_no"`
+	TradeNo  string `json:"trade_no"`
+	Status   uint32 `json:"status"`
+}
+
+type BatchOrderRequest struct {
+	OutBizNo   string `json:"out_biz_no"`
+	ActivityNo string `json:"activity_no"`
+	Number     int32  `json:"number"`
+	NotifyURL  string `json:"notify_url,omitempty"`
+}
+
+type BatchOrderResponse struct {
+	OutBizNo string `json:"out_biz_no"`
+	TradeNo  string `json:"trade_no"`
+	Status   string `json:"status"`
+}
+
+type BatchQueryRequest struct {
+	OutBizNo string `json:"out_biz_no,omitempty"`
+	TradeNo  string `json:"trade_no,omitempty"`
+}
+
+type BatchQueryResponse struct {
+	OutBizNo    string `json:"out_biz_no"`
+	TradeNo     string `json:"trade_no"`
+	Status      string `json:"status"`
+	DownloadURL string `json:"download_url,omitempty"`
+	ZipPassword string `json:"zip_password,omitempty"`
+}
+```
+
+// File: ymt_v3_2/crypto.go
+```go
+package ymt_v3_2
+
+import (
+	"bytes"
+	"crypto"
+	"crypto/aes"
+	"crypto/cipher"
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/sha256"
+	"crypto/x509"
+	"encoding/base64"
+	"encoding/json"
+	"encoding/pem"
+	"errors"
+	"fmt"
+	"sort"
+	"strings"
+)
+
+func parsePrivateKey(pemData string) (*rsa.PrivateKey, error) {
+	block, _ := pem.Decode([]byte(pemData))
+	if block == nil {
+		return nil, errors.New("failed to decode PEM block")
+	}
+	key, err := x509.ParsePKCS8PrivateKey(block.Bytes)
+	if err != nil {
+		key, err = x509.ParsePKCS1PrivateKey(block.Bytes)
+		if err != nil {
+			return nil, fmt.Errorf("parse private key: %w", err)
+		}
+	}
+	rsaKey, ok := key.(*rsa.PrivateKey)
+	if !ok {
+		return nil, errors.New("not an RSA private key")
+	}
+	return rsaKey, nil
+}
+
+func parsePublicKey(pemData string) (*rsa.PublicKey, error) {
+	block, _ := pem.Decode([]byte(pemData))
+	if block == nil {
+		return nil, errors.New("failed to decode PEM block")
+	}
+	key, err := x509.ParsePKIXPublicKey(block.Bytes)
+	if err != nil {
+		return nil, fmt.Errorf("parse public key: %w", err)
+	}
+	rsaKey, ok := key.(*rsa.PublicKey)
+	if !ok {
+		return nil, errors.New("not an RSA public key")
+	}
+	return rsaKey, nil
+}
+
+func marshalSortedNoZero(v interface{}) ([]byte, error) {
+	data, err := json.Marshal(v)
+	if err != nil {
+		return nil, err
+	}
+	var raw map[string]interface{}
+	if err := json.Unmarshal(data, &raw); err != nil {
+		return nil, err
+	}
+
+	filtered := removeZeroValues(raw)
+
+	keys := make([]string, 0, len(filtered))
+	for k := range filtered {
+		keys = append(keys, k)
+	}
+	sort.Strings(keys)
+
+	var buf bytes.Buffer
+	buf.WriteByte('{')
+	for i, k := range keys {
+		if i > 0 {
+			buf.WriteByte(',')
+		}
+		keyBytes, _ := json.Marshal(k)
+		buf.Write(keyBytes)
+		buf.WriteByte(':')
+		valBytes, err := json.Marshal(filtered[k])
+		if err != nil {
+			return nil, err
+		}
+		buf.Write(valBytes)
+	}
+	buf.WriteByte('}')
+	return buf.Bytes(), nil
+}
+
+func removeZeroValues(m map[string]interface{}) map[string]interface{} {
+	res := make(map[string]interface{})
+	for k, v := range m {
+		if isZeroValue(v) {
+			continue
+		}
+		if sub, ok := v.(map[string]interface{}); ok {
+			subFiltered := removeZeroValues(sub)
+			if len(subFiltered) > 0 {
+				res[k] = subFiltered
+			}
+		} else {
+			res[k] = v
+		}
+	}
+	return res
+}
+
+func isZeroValue(v interface{}) bool {
+	if v == nil {
+		return true
+	}
+	switch val := v.(type) {
+	case string:
+		return val == ""
+	case float64:
+		return val == 0
+	case bool:
+		return !val
+	case []interface{}:
+		return len(val) == 0
+	case map[string]interface{}:
+		return len(val) == 0
+	default:
+		return false
+	}
+}
+
+func aesEncryptECB(plaintext, key []byte) (string, error) {
+	block, err := aes.NewCipher(key)
+	if err != nil {
+		return "", err
+	}
+	blockSize := block.BlockSize()
+	plaintext = pkcs7Padding(plaintext, blockSize)
+
+	ciphertext := make([]byte, len(plaintext))
+	for i := 0; i < len(plaintext); i += blockSize {
+		block.Encrypt(ciphertext[i:i+blockSize], plaintext[i:i+blockSize])
+	}
+	return base64.StdEncoding.EncodeToString(ciphertext), nil
+}
+
+func aesDecryptECB(ciphertext string, key []byte) ([]byte, error) {
+	data, err := base64.StdEncoding.DecodeString(ciphertext)
+	if err != nil {
+		return nil, err
+	}
+	block, err := aes.NewCipher(key)
+	if err != nil {
+		return nil, err
+	}
+	blockSize := block.BlockSize()
+	if len(data)%blockSize != 0 {
+		return nil, errors.New("ciphertext is not a multiple of the block size")
+	}
+	plaintext := make([]byte, len(data))
+	for i := 0; i < len(data); i += blockSize {
+		block.Decrypt(plaintext[i:i+blockSize], data[i:i+blockSize])
+	}
+	plaintext, err = pkcs7Unpadding(plaintext, blockSize)
+	if err != nil {
+		return nil, err
+	}
+	return plaintext, nil
+}
+
+func pkcs7Padding(data []byte, blockSize int) []byte {
+	padding := blockSize - len(data)%blockSize
+	padtext := bytes.Repeat([]byte{byte(padding)}, padding)
+	return append(data, padtext...)
+}
+
+func pkcs7Unpadding(data []byte, blockSize int) ([]byte, error) {
+	length := len(data)
+	if length == 0 {
+		return nil, errors.New("empty data")
+	}
+	padding := int(data[length-1])
+	if padding > blockSize || padding == 0 {
+		return nil, errors.New("invalid padding")
+	}
+	for i := length - padding; i < length; i++ {
+		if data[i] != byte(padding) {
+			return nil, errors.New("invalid padding")
+		}
+	}
+	return data[:length-padding], nil
+}
+
+func rsaSign(data []byte, privateKey *rsa.PrivateKey) (string, error) {
+	hashed := sha256.Sum256(data)
+	signature, err := rsa.SignPKCS1v15(rand.Reader, privateKey, crypto.SHA256, hashed[:])
+	if err != nil {
+		return "", err
+	}
+	return base64.StdEncoding.EncodeToString(signature), nil
+}
+
+func rsaVerify(data []byte, sign string, publicKey *rsa.PublicKey) error {
+	signBytes, err := base64.StdEncoding.DecodeString(sign)
+	if err != nil {
+		return err
+	}
+	hashed := sha256.Sum256(data)
+	return rsa.VerifyPKCS1v15(publicKey, crypto.SHA256, hashed[:], signBytes)
+}
+
+func (c *Client) VerifyCallbackSign(appID, timestamp, sign string, callbackData map[string]interface{}) error {
+	filtered := removeZeroValues(callbackData)
+	keys := make([]string, 0, len(filtered))
+	for k := range filtered {
+		keys = append(keys, k)
+	}
+	sort.Strings(keys)
+	var buf bytes.Buffer
+	buf.WriteByte('{')
+	for i, k := range keys {
+		if i > 0 {
+			buf.WriteByte(',')
+		}
+		keyBytes, _ := json.Marshal(k)
+		buf.Write(keyBytes)
+		buf.WriteByte(':')
+		valBytes, err := json.Marshal(filtered[k])
+		if err != nil {
+			return err
+		}
+		buf.Write(valBytes)
+	}
+	buf.WriteByte('}')
+	plaintext := buf.Bytes()
+
+	ciphertext, err := aesEncryptECB(plaintext, c.aesKey)
+	if err != nil {
+		return err
+	}
+
+	signStr := appID + timestamp + ciphertext
+	return rsaVerify([]byte(signStr), sign, c.publicKey)
+}
+
+var _ = cipher.NewCBCEncrypter
+var _ = strings.ReplaceAll
+```
+
+// File: ymt_v3_2/errors.go
+```go
+package ymt_v3_2
+
+import "fmt"
+
+type APIError struct {
+	Code    int32  `json:"code"`
+	Message string `json:"message"`
+	Reason  string `json:"reason,omitempty"`
+}
+
+func (e *APIError) Error() string {
+	return fmt.Sprintf("API error: code=%d, message=%s, reason=%s", e.Code, e.Message, e.Reason)
+}
+```
+
+// File: ymt_v3_2/api_key.go
+```go
+package ymt_v3_2
+
+import "context"
+
+func (c *Client) GetKey(ctx context.Context, req *GetKeyRequest) (*GetKeyResponse, error) {
+	var resp GetKeyResponse
+	err := c.Do(ctx, "POST", "/openapi/v1/key/order", req, &resp)
+	if err != nil {
+		return nil, err
+	}
+	return &resp, nil
+}
+
+func (c *Client) QueryKey(ctx context.Context, req *QueryKeyRequest) (*QueryKeyResponse, error) {
+	var resp QueryKeyResponse
+	err := c.Do(ctx, "POST", "/openapi/v1/key/query", req, &resp)
+	if err != nil {
+		return nil, err
+	}
+	return &resp, nil
+}
+
+func (c *Client) DiscardKey(ctx context.Context, req *DiscardKeyRequest) (*DiscardKeyResponse, error) {
+	var resp DiscardKeyResponse
+	err := c.Do(ctx, "POST", "/openapi/v1/key/discard", req, &resp)
+	if err != nil {
+		return nil, err
+	}
+	return &resp, nil
+}
+
+func (c *Client) BatchOrder(ctx context.Context, req *BatchOrderRequest) (*BatchOrderResponse, error) {
+	var resp BatchOrderResponse
+	err := c.Do(ctx, "POST", "/openapi/v1/key/batch_order", req, &resp)
+	if err != nil {
+		return nil, err
+	}
+	return &resp, nil
+}
+
+func (c *Client) BatchQuery(ctx context.Context, req *BatchQueryRequest) (*BatchQueryResponse, error) {
+	var resp BatchQueryResponse
+	err := c.Do(ctx, "POST", "/openapi/v1/key/batch_query", req, &resp)
+	if err != nil {
+		return nil, err
+	}
+	return &resp, nil
+}
+```
+
+// File: ymt_v3_2/example_test.go
+```go
+package ymt_v3_2_test
+
+import (
+	"context"
+	"fmt"
+	"testing"
+	"time"
+
+	"ymt_v3_2"
+)
+
+const (
+	testAppID      = "xxx"
+	testPrivateKey = `-----BEGIN PRIVATE KEY-----
+xxx
+-----END PRIVATE KEY-----`
+	testPublicKey = `-----BEGIN PUBLIC KEY-----
+xxx
+-----END PUBLIC KEY-----`
+	testAESKey     = "xxxx"
+	testActivityNo = "xxxx"
+)
+
+func newTestClient() *ymt_v3_2.Client {
+	return ymt_v3_2.NewClient(
+		ymt_v3_2.WithBaseURL("https://gateway.dev.cdlsxd.cn"),
+		ymt_v3_2.WithAppID(testAppID),
+		ymt_v3_2.WithPrivateKeyPEM(testPrivateKey),
+		ymt_v3_2.WithPublicKeyPEM(testPublicKey),
+		ymt_v3_2.WithAESKey(testAESKey),
+		ymt_v3_2.WithTimeout(10*time.Second),
+	)
+}
+
+func TestGetKey(t *testing.T) {
+	client := newTestClient()
+	ctx := context.Background()
+	req := &ymt_v3_2.GetKeyRequest{
+		OutBizNo:   fmt.Sprintf("test_%d", time.Now().UnixNano()),
+		ActivityNo: testActivityNo,
+		Account:    "18666666666",
+		NotifyURL:  "https://notify.example.com/openapi",
+	}
+	resp, err := client.GetKey(ctx, req)
+	if err != nil {
+		t.Fatalf("GetKey failed: %v", err)
+	}
+	t.Logf("GetKey response: %+v", resp)
+}
+
+func TestQueryKey(t *testing.T) {
+	client := newTestClient()
+	ctx := context.Background()
+	req := &ymt_v3_2.QueryKeyRequest{
+		OutBizNo: "order_001",
+	}
+	resp, err := client.QueryKey(ctx, req)
+	if err != nil {
+		t.Fatalf("QueryKey failed: %v", err)
+	}
+	t.Logf("QueryKey response: %+v", resp)
+}
+
+func TestDiscardKey(t *testing.T) {
+	client := newTestClient()
+	ctx := context.Background()
+	req := &ymt_v3_2.DiscardKeyRequest{
+		TradeNo: "7251449503000383488",
+	}
+	resp, err := client.DiscardKey(ctx, req)
+	if err != nil {
+		t.Fatalf("DiscardKey failed: %v", err)
+	}
+	t.Logf("DiscardKey response: %+v", resp)
+}
+
+func TestBatchOrder(t *testing.T) {
+	client := newTestClient()
+	ctx := context.Background()
+	req := &ymt_v3_2.BatchOrderRequest{
+		OutBizNo:   fmt.Sprintf("batch_%d", time.Now().UnixNano()),
+		ActivityNo: testActivityNo,
+		Number:     10,
+		NotifyURL:  "https://notify.example.com/openapi",
+	}
+	resp, err := client.BatchOrder(ctx, req)
+	if err != nil {
+		t.Fatalf("BatchOrder failed: %v", err)
+	}
+	t.Logf("BatchOrder response: %+v", resp)
+}
+
+func TestBatchQuery(t *testing.T) {
+	client := newTestClient()
+	ctx := context.Background()
+	req := &ymt_v3_2.BatchQueryRequest{
+		OutBizNo: "batch_001",
+	}
+	resp, err := client.BatchQuery(ctx, req)
+	if err != nil {
+		t.Fatalf("BatchQuery failed: %v", err)
+	}
+	t.Logf("BatchQuery response: %+v", resp)
+}
+```
\ No newline at end of file