diff --git a/config.default.yaml b/config.default.yaml
index 37ba375..d88e0dc 100644
--- a/config.default.yaml
+++ b/config.default.yaml
@@ -30,7 +30,8 @@ email:
 secrets:
     jwt_secret: example
     turnstile_secret: example
-    client_secret_key: example
+    client_secret_key: aes_32_byte_string
+    kyc_info_key: aes_32_byte_string
 ttl:
     auth_code_ttl: 10m
     access_ttl: 15s
diff --git a/config/types.go b/config/types.go
index c4af613..d470c12 100644
--- a/config/types.go
+++ b/config/types.go
@@ -53,6 +53,7 @@ type secrets struct {
 	JwtSecret       string `yaml:"jwt_secret"`
 	TurnstileSecret string `yaml:"turnstile_secret"`
 	ClientSecretKey string `yaml:"client_secret_key"`
+	KycInfoKey      string `yaml:"kyc_info_key"`
 }
 
 type ttl struct {
diff --git a/data/agenda.go b/data/agenda.go
new file mode 100644
index 0000000..2955ef1
--- /dev/null
+++ b/data/agenda.go
@@ -0,0 +1,13 @@
+package data
+
+import "github.com/google/uuid"
+
+type Agenda struct {
+	Id          uint      `json:"id" gorm:"primarykey;autoIncrement"`
+	UUID        uuid.UUID `json:"uuid" gorm:"type:uuid;uniqueIndex;not null"`
+	AgendaId    uuid.UUID `json:"agenda_id" gorm:"type:uuid;uniqueIndex;not null"`
+	EventId     uuid.UUID `json:"event_id" gorm:"type:uuid;uniqueIndex:unique_event_user;not null"`
+	UserId      uuid.UUID `json:"user_id" gorm:"type:uuid;uniqueIndex:unique_event_user;not null"`
+	Name        string    `json:"name" gorm:"type:varchar(255);not null"`
+	Description string    `json:"description" gorm:"type:text;not null"`
+}
diff --git a/data/attendance.go b/data/attendance.go
index 7e82da7..bf6c351 100644
--- a/data/attendance.go
+++ b/data/attendance.go
@@ -21,6 +21,7 @@ type Attendance struct {
 	EventId      uuid.UUID `json:"event_id" gorm:"type:uuid;uniqueIndex:unique_event_user;not null"`
 	UserId       uuid.UUID `json:"user_id" gorm:"type:uuid;uniqueIndex:unique_event_user;not null"`
 	Role         string    `json:"role" gorm:"type:varchar(255);not null"`
+	KycInfo      string    `json:"kyc_info" gorm:"type:text"`
 	CheckinAt    time.Time `json:"checkin_at"`
 }
 
diff --git a/pkgs/authtoken/token.go b/pkgs/authtoken/authtoken.go
similarity index 100%
rename from pkgs/authtoken/token.go
rename to pkgs/authtoken/authtoken.go
diff --git a/pkgs/kyc/kyc.go b/pkgs/kyc/kyc.go
new file mode 100644
index 0000000..4b5b09d
--- /dev/null
+++ b/pkgs/kyc/kyc.go
@@ -0,0 +1,50 @@
+package kyc
+
+import (
+	"encoding/base64"
+	"encoding/json"
+	"errors"
+	"nixcn-cms/internal/cryptography"
+
+	"github.com/spf13/viper"
+)
+
+func EncodeB64Json(b64Json string) (*string, error) {
+	rawJson, err := base64.StdEncoding.DecodeString(b64Json)
+	if err != nil {
+		return nil, errors.New("invalid base64 json")
+	}
+
+	var kyc KycInfo
+	if err := json.Unmarshal(rawJson, &kyc); err != nil {
+		return nil, errors.New("invalid json structure")
+	}
+
+	plainJson, err := json.Marshal(kyc)
+	if err != nil {
+		return nil, err
+	}
+
+	aesKey := viper.GetString("secrets.kyc_info_key")
+	encrypted, err := cryptography.AESCBCEncrypt(plainJson, []byte(aesKey))
+	if err != nil {
+		return nil, err
+	}
+
+	return &encrypted, nil
+}
+
+func DecodeAES(cipherStr string) (*KycInfo, error) {
+	aesKey := viper.GetString("secrets.kyc_info_key")
+	plainBytes, err := cryptography.AESCBCDecrypt(cipherStr, []byte(aesKey))
+	if err != nil {
+		return nil, err
+	}
+
+	var kyc KycInfo
+	if err := json.Unmarshal(plainBytes, &kyc); err != nil {
+		return nil, errors.New("invalid decrypted json")
+	}
+
+	return &kyc, nil
+}
diff --git a/pkgs/kyc/types.go b/pkgs/kyc/types.go
new file mode 100644
index 0000000..92595e3
--- /dev/null
+++ b/pkgs/kyc/types.go
@@ -0,0 +1,7 @@
+package kyc
+
+type KycInfo struct {
+	Type       string `json:"type"` // Chinese / Foreigner
+	LegalName  string `json:"legal_name"`
+	ResidentId string `json:"rsident_id"`
+}