diff --git a/main.go b/main.go
new file mode 100644
index 0000000..ea6ee62
--- /dev/null
+++ b/main.go
@@ -0,0 +1,88 @@
+package main
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"net/http"
+)
+
+func signIn(config interface{}, accessToken string, phone string) bool {
+	url := "https://member.aliyundrive.com/v1/activity/sign_in_list"
+
+	reqBody, err := json.Marshal(map[string]interface{}{})
+	if err != nil {
+		log.Printf("[%s] 签到失败, 错误信息: %v\n", phone, err)
+		return false
+	}
+
+	req, err := http.NewRequest("POST", url, bytes.NewBuffer(reqBody))
+	if err != nil {
+		log.Printf("[%s] 签到失败, 错误信息: %v\n", phone, err)
+		return false
+	}
+
+	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", accessToken))
+	req.Header.Set("Content-Type", "application/json")
+
+	client := &http.Client{}
+	resp, err := client.Do(req)
+	if err != nil {
+		log.Printf("[%s] 签到失败, 错误信息: %v\n", phone, err)
+		return false
+	}
+	defer resp.Body.Close()
+
+	body, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		log.Printf("[%s] 签到失败, 错误信息: %v\n", phone, err)
+		return false
+	}
+
+	var data map[string]interface{}
+	err = json.Unmarshal(body, &data)
+	if err != nil {
+		log.Printf("[%s] 签到失败, 错误信息: %v\n", phone, err)
+		return false
+	}
+
+	if _, ok := data["success"]; !ok {
+		log.Printf("[%s] 签到失败, 错误信息: %v\n", phone, data)
+		return false
+	}
+
+	var currentDay map[string]interface{}
+	for i, day := range data["result"].(map[string]interface{})["signInLogs"].([]interface{}) {
+		if day.(map[string]interface{})["status"].(string) == "miss" {
+			currentDay = data["result"].(map[string]interface{})["signInLogs"].([]interface{})[i-1].(map[string]interface{})
+			break
+		}
+	}
+
+	reward := "无奖励"
+	if currentDay != nil && currentDay["isReward"].(bool) {
+		reward = fmt.Sprintf("获得 %s %s", currentDay["reward"].(map[string]interface{})["name"].(string), currentDay["reward"].(map[string]interface{})["description"].(string))
+	}
+
+	log.Printf("[%s] 签到成功, 本月累计签到 %d 天.\n", phone, int(data["result"].(map[string]interface{})["signInCount"].(float64)))
+	log.Printf("[%s] 本次签到 %s\n", phone, reward)
+
+	push(config, phone, reward, int(data["result"].(map[string]interface{})["signInCount"].(float64)))
+
+	return true
+}
+
+func push(config interface{}, phone string, reward string, signInCount int) {
+	// push notification implementation here
+}
+
+func main() {
+	// Example usage:
+	accessToken := "your-access-token"
+	phone := "your-phone-number"
+	config := map[string]interface{}{} // or ConfigObj object
+
+	signIn(config, accessToken, phone)
+}