diff --git a/coolq/api.go b/coolq/api.go
index be8ca76..b59e538 100644
--- a/coolq/api.go
+++ b/coolq/api.go
@@ -4,6 +4,7 @@ import (
 	"crypto/md5"
 	"encoding/hex"
 	"io/ioutil"
+	"math"
 	"os"
 	"path"
 	"path/filepath"
@@ -667,8 +668,11 @@ func (bot *CQBot) CQGetStrangerInfo(userId int64) MSG {
 		"sex": func() string {
 			if info.Sex == 1 {
 				return "female"
+			} else if info.Sex == 0 {
+				return "male"
 			}
-			return "male"
+			// unknown = 0x2
+			return "unknown"
 		}(),
 		"age":        info.Age,
 		"level":      info.Level,
@@ -848,7 +852,14 @@ func (bot *CQBot) CQGetGroupMessageHistory(groupId int64, seq int64) MSG {
 	if g := bot.Client.FindGroup(groupId); g == nil {
 		return Failed(100, "GROUP_NOT_FOUND", "群聊不存在")
 	}
-	msg, err := bot.Client.GetGroupMessages(groupId, seq-19, seq)
+	if seq == 0 {
+		g, err := bot.Client.GetGroupInfo(groupId)
+		if err != nil {
+			return Failed(100, "GROUP_INFO_API_ERROR", err.Error())
+		}
+		seq = g.LastMsgSeq
+	}
+	msg, err := bot.Client.GetGroupMessages(groupId, int64(math.Max(float64(seq-19), 1)), seq)
 	if err != nil {
 		log.Warnf("获取群历史消息失败: %v", err)
 		return Failed(100, "MESSAGES_API_ERROR", err.Error())
@@ -1008,11 +1019,19 @@ func Failed(code int, msg ...string) MSG {
 
 func convertGroupMemberInfo(groupId int64, m *client.GroupMemberInfo) MSG {
 	return MSG{
-		"group_id":       groupId,
-		"user_id":        m.Uin,
-		"nickname":       m.Nickname,
-		"card":           m.CardName,
-		"sex":            "unknown",
+		"group_id": groupId,
+		"user_id":  m.Uin,
+		"nickname": m.Nickname,
+		"card":     m.CardName,
+		"sex": func() string {
+			if m.Gender == 1 {
+				return "female"
+			} else if m.Gender == 0 {
+				return "male"
+			}
+			// unknown = 0xff
+			return "unknown"
+		}(),
 		"age":            0,
 		"area":           "",
 		"join_time":      m.JoinTime,
diff --git a/coolq/event.go b/coolq/event.go
index 5555563..a2dfcd1 100644
--- a/coolq/event.go
+++ b/coolq/event.go
@@ -422,8 +422,8 @@ func (bot *CQBot) otherClientStatusChangedEvent(c *client.QQClient, e *client.Ot
 	bot.dispatchEventMessage(MSG{
 		"post_type":   "notice",
 		"notice_type": "client_status",
+		"online":      e.Online,
 		"client": MSG{
-			"online":      e.Online,
 			"app_id":      e.Client.AppId,
 			"device_name": e.Client.DeviceName,
 			"device_kind": e.Client.DeviceKind,
diff --git a/docs/cqhttp.md b/docs/cqhttp.md
index f5686b6..f660e64 100644
--- a/docs/cqhttp.md
+++ b/docs/cqhttp.md
@@ -850,6 +850,30 @@ JSON数组:
 
 > 不提供起始序号将默认获取最新的消息
 
+### 获取当前账号在线客户端列表
+
+终结点：`/get_online_clients`
+
+**参数** 
+
+| 字段       | 类型   | 说明                      |
+| ---------- | ------ | ------------------------- |
+| `no_cache` | bool  | 是否无视缓存  |
+
+**响应数据**
+
+| 字段        | 类型       | 说明            |
+| ---------- | ---------- | ------------ |
+| `clients`    | []Device       |  在线客户端列表  |
+
+**Device**
+
+| 字段        | 类型       | 说明            |
+| ---------- | ---------- | ------------ |
+| `app_id`    | int64       |  客户端ID |
+| `device_name`    | string       |  设备名称 |
+| `device_kind`    | string       |  设备类型 |
+
 ### 获取用户VIP信息
 
 终结点：`/_get_vip_info`
@@ -1013,3 +1037,14 @@ JSON数组:
 | `name` | string |          | 文件名   |
 | `size` | int64  |          | 文件大小 |
 | `url`  | string |          | 下载链接 |
+
+### 其他客户端在线状态变更
+
+**上报数据**
+
+| 字段          | 类型   | 可能的值       | 说明     |
+| ------------- | ------ | -------------- | -------- |
+| `post_type`   | string | `notice`       | 上报类型 |
+| `notice_type` | string | `client_status` | 消息类型 |
+| `client`      | Device  |                | 客户端信息 |
+| `online`        | bool |                | 当前是否在线 |
\ No newline at end of file
diff --git a/global/config.go b/global/config.go
index 0396534..82f4cee 100644
--- a/global/config.go
+++ b/global/config.go
@@ -135,6 +135,9 @@ var DefaultConfigWithComments = `
 }
 `
 
+//PasswordHash 存储QQ密码哈希供登录使用
+var PasswordHash [16]byte
+
 //JSONConfig Config对应的结构体
 type JSONConfig struct {
 	Uin               int64  `json:"uin"`
diff --git a/go.mod b/go.mod
index 760ad91..dcf8a63 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,7 @@ module github.com/Mrs4s/go-cqhttp
 go 1.15
 
 require (
-	github.com/Mrs4s/MiraiGo v0.0.0-20210124063508-a401ed3ef104
+	github.com/Mrs4s/MiraiGo v0.0.0-20210124065645-9549a32d954a
 	github.com/dustin/go-humanize v1.0.0
 	github.com/gin-contrib/pprof v1.3.0
 	github.com/gin-gonic/gin v1.6.3
@@ -21,6 +21,7 @@ require (
 	github.com/t-tomalak/logrus-easy-formatter v0.0.0-20190827215021-c074f06c5816
 	github.com/tidwall/gjson v1.6.7
 	github.com/yinghau76/go-ascii-art v0.0.0-20190517192627-e7f465a30189
+	golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2
 	golang.org/x/term v0.0.0-20201210144234-2321bbc49cbf
 	golang.org/x/time v0.0.0-20201208040808-7e3f01d25324
 )
diff --git a/go.sum b/go.sum
index 6f50907..4a055af 100644
--- a/go.sum
+++ b/go.sum
@@ -1,7 +1,7 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/Mrs4s/MiraiGo v0.0.0-20210124063508-a401ed3ef104 h1:dIKRhxzCrt/jdWRFdJupIU3BM94IYoicgqRzjN+2Bw4=
-github.com/Mrs4s/MiraiGo v0.0.0-20210124063508-a401ed3ef104/go.mod h1:9V7DdSwpEfCKQNvLZhRnFJFkelTU0tPLfwR5l6UFF1Y=
+github.com/Mrs4s/MiraiGo v0.0.0-20210124065645-9549a32d954a h1:ov5QCDpZpsr+geKLVON7E63UqrpNF0oTiKuZwbKwEmo=
+github.com/Mrs4s/MiraiGo v0.0.0-20210124065645-9549a32d954a/go.mod h1:9V7DdSwpEfCKQNvLZhRnFJFkelTU0tPLfwR5l6UFF1Y=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -110,6 +110,7 @@ github.com/ugorji/go/codec v1.1.7 h1:2SvQaVZ1ouYrrKKwoSk2pzd4A9evlKJb9oTL+OaLUSs
 github.com/ugorji/go/codec v1.1.7/go.mod h1:Ax+UKWsSmolVDwsd+7N3ZtXu+yMGCf907BLYF3GoBXY=
 github.com/yinghau76/go-ascii-art v0.0.0-20190517192627-e7f465a30189 h1:4UJw9if55Fu3HOwbfcaQlJ27p3oeJU2JZqoeT3ITJQk=
 github.com/yinghau76/go-ascii-art v0.0.0-20190517192627-e7f465a30189/go.mod h1:rIrm5geMiBhPQkdfUm8gDFi/WiHneOp1i9KjmJqc+9I=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2 h1:VklqNMn3ovrHsnt90PveolxSbWFaJdECFbxSq0Mqo2M=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
diff --git a/main.go b/main.go
index 63a756c..5f519f3 100644
--- a/main.go
+++ b/main.go
@@ -2,8 +2,11 @@ package main
 
 import (
 	"bufio"
+	"crypto/aes"
 	"crypto/md5"
+	"crypto/sha1"
 	"encoding/base64"
+	"encoding/hex"
 	"fmt"
 	"io"
 	"io/ioutil"
@@ -23,6 +26,7 @@ import (
 	"github.com/guonaihong/gout"
 	"github.com/tidwall/gjson"
 	"golang.org/x/term"
+	"golang.org/x/crypto/pbkdf2"
 
 	"github.com/Mrs4s/MiraiGo/binary"
 	"github.com/Mrs4s/MiraiGo/client"
@@ -233,15 +237,11 @@ func main() {
 	}
 	if conf.EncryptPassword && conf.PasswordEncrypted == "" {
 		log.Infof("密码加密已启用, 请输入Key对密码进行加密: (Enter 提交)")
-		byteKey, _ := term.ReadPassword(int(os.Stdin.Fd()))
-		key := md5.Sum(byteKey)
-		if encrypted := EncryptPwd(conf.Password, key[:]); encrypted != "" {
-			conf.Password = ""
-			conf.PasswordEncrypted = encrypted
-			_ = conf.Save("config.hjson")
-		} else {
-			log.Warnf("加密时出现问题.")
-		}
+		byteKey, _ = term.ReadPassword(int(os.Stdin.Fd()))
+		global.PasswordHash = md5.Sum([]byte(conf.Password))
+		conf.Password = ""
+		conf.PasswordEncrypted = "AES:" + PasswordHashEncrypt(global.PasswordHash[:], byteKey)
+		_ = conf.Save("config.hjson")
 	}
 	if conf.PasswordEncrypted != "" {
 		if len(byteKey) == 0 {
@@ -262,8 +262,23 @@ func main() {
 		} else {
 			log.Infof("密码加密已启用, 使用运行时传递的参数进行解密，按 Ctrl+C 取消.")
 		}
-		key := md5.Sum(byteKey)
-		conf.Password = DecryptPwd(conf.PasswordEncrypted, key[:])
+
+		//升级客户端密码加密方案，MD5+TEA 加密密码 -> PBKDF2+AES 加密 MD5
+		//升级后的 PasswordEncrypted 字符串以"AES:"开始，其后为 Hex 编码的16字节加密 MD5
+		if !strings.HasPrefix(conf.PasswordEncrypted, "AES:") {
+			password := OldPasswordDecrypt(conf.PasswordEncrypted, byteKey)
+			passwordHash := md5.Sum([]byte(password))
+			newPasswordHash := PasswordHashEncrypt(passwordHash[:], byteKey)
+			conf.PasswordEncrypted = "AES:" + newPasswordHash
+			_ = conf.Save("config.hjson")
+			log.Debug("密码加密方案升级完成")
+		}
+
+		ph, err := PasswordHashDecrypt(conf.PasswordEncrypted[4:], byteKey)
+		if err != nil {
+			log.Fatalf("加密存储的密码损坏，请尝试重新配置密码")
+		}
+		copy(global.PasswordHash[:], ph)
 	}
 	if !isFastStart {
 		log.Info("Bot将在5秒后登录并开始信息处理, 按 Ctrl+C 取消.")
@@ -283,7 +298,7 @@ func main() {
 		}
 		return "未知"
 	}())
-	cli := client.NewClient(conf.Uin, conf.Password)
+	cli := client.NewClientMd5(conf.Uin, global.PasswordHash)
 	cli.OnLog(func(c *client.QQClient, e *client.LogEvent) {
 		switch e.Type {
 		case "INFO":
@@ -340,27 +355,50 @@ func main() {
 	}
 }
 
-//EncryptPwd 通过给定key加密给定pwd
-func EncryptPwd(pwd string, key []byte) string {
-	tea := binary.NewTeaCipher(key)
-	if tea == nil {
-		return ""
+// PasswordHashEncrypt 使用key加密给定passwordHash
+func PasswordHashEncrypt(passwordHash []byte, key []byte) string {
+	if len(passwordHash) != 16 {
+		panic("密码加密参数错误")
 	}
-	return base64.StdEncoding.EncodeToString(tea.Encrypt([]byte(pwd)))
+
+	key = pbkdf2.Key(key, key, 114514, 32, sha1.New)
+
+	cipher, _ := aes.NewCipher(key)
+	result := make([]byte, 16)
+	cipher.Encrypt(result, passwordHash)
+
+	return hex.EncodeToString(result)
 }
 
-//DecryptPwd 通过给定key解密给定ePwd
-func DecryptPwd(ePwd string, key []byte) string {
+// PasswordHashDecrypt 使用key解密给定passwordHash
+func PasswordHashDecrypt(encryptedPasswordHash string, key []byte) ([]byte, error) {
+	ciphertext, err := hex.DecodeString(encryptedPasswordHash)
+	if err != nil {
+		return nil, err
+	}
+
+	key = pbkdf2.Key(key, key, 114514, 32, sha1.New)
+
+	cipher, _ := aes.NewCipher(key)
+	result := make([]byte, 16)
+	cipher.Decrypt(result, ciphertext)
+
+	return result, nil
+}
+
+// OldPasswordDecrypt 使用key解密老password，仅供兼容使用
+func OldPasswordDecrypt(encryptedPassword string, key []byte) string {
 	defer func() {
 		if pan := recover(); pan != nil {
 			log.Fatalf("密码解密失败: %v", pan)
 		}
 	}()
-	encrypted, err := base64.StdEncoding.DecodeString(ePwd)
+	encKey := md5.Sum(key)
+	encrypted, err := base64.StdEncoding.DecodeString(encryptedPassword)
 	if err != nil {
 		panic(err)
 	}
-	tea := binary.NewTeaCipher(key)
+	tea := binary.NewTeaCipher(encKey[:])
 	if tea == nil {
 		panic("密钥错误")
 	}