diff --git a/CHANGELOG b/CHANGELOG
index 2cebd7a..3ce05eb 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -54,6 +54,7 @@ c. 在github上发布新版本。
 TO RELEASE
 tank-3.1.0
 1. Add prop column into tank31_matter
+2. Add charset in mysql config.
 
 
 ALTER TABLE `tank`.`tank30_matter`
diff --git a/code/core/config.go b/code/core/config.go
index 5b5a1cc..0dc56af 100644
--- a/code/core/config.go
+++ b/code/core/config.go
@@ -23,5 +23,5 @@ type Config interface {
 	//files storage location.
 	MatterPath() string
 	//when installed by user. Write configs to tank.json
-	FinishInstall(mysqlPort int, mysqlHost string, mysqlSchema string, mysqlUsername string, mysqlPassword string)
+	FinishInstall(mysqlPort int, mysqlHost string, mysqlSchema string, mysqlUsername string, mysqlPassword string, mysqlCharset string)
 }
diff --git a/code/rest/dav_service.go b/code/rest/dav_service.go
index f207273..894900f 100644
--- a/code/rest/dav_service.go
+++ b/code/rest/dav_service.go
@@ -89,7 +89,8 @@ func (this *DavService) PropstatsFromXmlNames(user *User, matter *Matter, xmlNam
 
 	propstats := make([]dav.Propstat, 0)
 
-	var properties []dav.Property
+	var okProperties []dav.Property
+	var notFoundProperties []dav.Property
 
 	for _, xmlName := range xmlNames {
 		//TODO: deadprops not implement yet.
@@ -98,22 +99,48 @@ func (this *DavService) PropstatsFromXmlNames(user *User, matter *Matter, xmlNam
 		if liveProp := LivePropMap[xmlName]; liveProp.findFn != nil && (liveProp.dir || !matter.Dir) {
 			innerXML := liveProp.findFn(user, matter)
 
-			properties = append(properties, dav.Property{
+			okProperties = append(okProperties, dav.Property{
 				XMLName:  xmlName,
 				InnerXML: []byte(innerXML),
 			})
 		} else {
-			this.logger.Info("%s %s cannot finish.", matter.Path, xmlName.Local)
+			this.logger.Info("handle props %s %s.", matter.Path, xmlName.Local)
+
+			propMap := matter.FetchPropMap()
+			if value, isPresent := propMap[xmlName.Local]; isPresent {
+				okProperties = append(okProperties, dav.Property{
+					XMLName:  xmlName,
+					InnerXML: []byte(value),
+				})
+			} else {
+
+				//only accept Space not null.
+				if xmlName.Space != "" {
+
+					//collect not found props
+					notFoundProperties = append(notFoundProperties, dav.Property{
+						XMLName:  xmlName,
+						InnerXML: []byte(""),
+					})
+				}
+
+			}
 		}
 	}
 
-	if len(properties) == 0 {
+	if len(okProperties) == 0 && len(notFoundProperties) == 0 {
 		panic(result.BadRequest("cannot parse request properties"))
 	}
 
-	okPropstat := dav.Propstat{Status: http.StatusOK, Props: properties}
+	if len(okProperties) != 0 {
+		okPropstat := dav.Propstat{Status: http.StatusOK, Props: okProperties}
+		propstats = append(propstats, okPropstat)
+	}
 
-	propstats = append(propstats, okPropstat)
+	if len(notFoundProperties) != 0 {
+		notFoundPropstat := dav.Propstat{Status: http.StatusNotFound, Props: notFoundProperties}
+		propstats = append(propstats, notFoundPropstat)
+	}
 
 	return propstats
 
@@ -154,6 +181,11 @@ func (this *DavService) Propstats(user *User, matter *Matter, propfind *dav.Prop
 //list the directory.
 func (this *DavService) HandlePropfind(writer http.ResponseWriter, request *http.Request, user *User, subPath string) {
 
+	xLimits := request.Header.Get("X-Litmus")
+	if xLimits == "props: 3 (propfind_invalid2)" {
+		fmt.Println("stop here!")
+	}
+
 	fmt.Printf("PROPFIND %s\n", subPath)
 
 	// read depth
@@ -202,6 +234,11 @@ func (this *DavService) HandleProppatch(writer http.ResponseWriter, request *htt
 
 	fmt.Printf("PROPPATCH %s\n", subPath)
 
+	xLimits := request.Header.Get("X-Litmus")
+	if xLimits == "props: 17 (prophighunicode)" {
+		fmt.Println("stop here!")
+	}
+
 	matter := this.matterDao.checkByUserUuidAndPath(user.Uuid, subPath)
 
 	patches, status, err := webdav.ReadProppatch(request.Body)
@@ -218,6 +255,13 @@ func (this *DavService) HandleProppatch(writer http.ResponseWriter, request *htt
 		propStat := dav.Propstat{Status: http.StatusOK}
 		if patch.Remove {
 
+			if len(patch.Props) > 0 {
+				property := patch.Props[0]
+				if _, isPresent := propMap[property.XMLName.Local]; isPresent {
+					//delete the prop.
+					delete(propMap, property.XMLName.Local)
+				}
+			}
 		} else {
 			for _, prop := range patch.Props {
 				propMap[prop.XMLName.Local] = string(prop.InnerXML)
diff --git a/code/rest/install_controller.go b/code/rest/install_controller.go
index cb942a8..ce541cb 100644
--- a/code/rest/install_controller.go
+++ b/code/rest/install_controller.go
@@ -97,6 +97,7 @@ func (this *InstallController) openDbConnection(writer http.ResponseWriter, requ
 	mysqlSchema := request.FormValue("mysqlSchema")
 	mysqlUsername := request.FormValue("mysqlUsername")
 	mysqlPassword := request.FormValue("mysqlPassword")
+	mysqlCharset := request.FormValue("mysqlCharset")
 
 	var mysqlPort int
 	if mysqlPortStr != "" {
@@ -105,7 +106,7 @@ func (this *InstallController) openDbConnection(writer http.ResponseWriter, requ
 		mysqlPort = tmp
 	}
 
-	mysqlUrl := util.GetMysqlUrl(mysqlPort, mysqlHost, mysqlSchema, mysqlUsername, mysqlPassword)
+	mysqlUrl := util.GetMysqlUrl(mysqlPort, mysqlHost, mysqlSchema, mysqlUsername, mysqlPassword, mysqlCharset)
 
 	this.logger.Info("Connect MySQL %s", mysqlUrl)
 
@@ -227,7 +228,7 @@ func (this *InstallController) CreateTable(writer http.ResponseWriter, request *
 	for _, iBase := range this.tableNames {
 
 		//complete the missing fields or create table. use utf8 charset
-		db1 := db.Set("gorm:table_options", "CHARSET=utf8").AutoMigrate(iBase)
+		db1 := db.Set("gorm:table_options", "CHARSET=utf8mb4").AutoMigrate(iBase)
 		this.PanicError(db1.Error)
 
 		exist, allFields, missingFields := this.getTableMeta(db, iBase)
@@ -350,6 +351,7 @@ func (this *InstallController) Finish(writer http.ResponseWriter, request *http.
 	mysqlSchema := request.FormValue("mysqlSchema")
 	mysqlUsername := request.FormValue("mysqlUsername")
 	mysqlPassword := request.FormValue("mysqlPassword")
+	mysqlCharset := request.FormValue("mysqlCharset")
 
 	var mysqlPort int
 	if mysqlPortStr != "" {
@@ -375,7 +377,7 @@ func (this *InstallController) Finish(writer http.ResponseWriter, request *http.
 	}
 
 	//announce the config to write config to tank.json
-	core.CONFIG.FinishInstall(mysqlPort, mysqlHost, mysqlSchema, mysqlUsername, mysqlPassword)
+	core.CONFIG.FinishInstall(mysqlPort, mysqlHost, mysqlSchema, mysqlUsername, mysqlPassword, mysqlCharset)
 
 	//announce the context to broadcast the installation news to bean.
 	core.CONTEXT.InstallOk()
diff --git a/code/support/tank_config.go b/code/support/tank_config.go
index 246f189..823db75 100644
--- a/code/support/tank_config.go
+++ b/code/support/tank_config.go
@@ -40,6 +40,8 @@ type ConfigItem struct {
 	MysqlUsername string
 	//mysql password
 	MysqlPassword string
+	//mysql charset
+	MysqlCharset string
 }
 
 //validate whether the config file is ok
@@ -74,6 +76,10 @@ func (this *ConfigItem) validate() bool {
 		core.LOGGER.Error("MysqlSchema  is not configured")
 		return false
 	}
+	if this.MysqlCharset == "" {
+		core.LOGGER.Error("MysqlCharset  is not configured")
+		return false
+	}
 
 	return true
 
@@ -144,7 +150,7 @@ func (this *TankConfig) ReadFromConfigFile() {
 		}
 		util.MakeDirAll(this.matterPath)
 
-		this.mysqlUrl = util.GetMysqlUrl(this.item.MysqlPort, this.item.MysqlHost, this.item.MysqlSchema, this.item.MysqlUsername, this.item.MysqlPassword)
+		this.mysqlUrl = util.GetMysqlUrl(this.item.MysqlPort, this.item.MysqlHost, this.item.MysqlSchema, this.item.MysqlUsername, this.item.MysqlPassword, this.item.MysqlCharset)
 		this.installed = true
 
 		core.LOGGER.Info("use config file: %s", filePath)
@@ -173,7 +179,7 @@ func (this *TankConfig) MatterPath() string {
 }
 
 //Finish the installation. Write config to tank.json
-func (this *TankConfig) FinishInstall(mysqlPort int, mysqlHost string, mysqlSchema string, mysqlUsername string, mysqlPassword string) {
+func (this *TankConfig) FinishInstall(mysqlPort int, mysqlHost string, mysqlSchema string, mysqlUsername string, mysqlPassword string, mysqlCharset string) {
 
 	var configItem = &ConfigItem{
 		//server port
@@ -185,6 +191,7 @@ func (this *TankConfig) FinishInstall(mysqlPort int, mysqlHost string, mysqlSche
 		MysqlSchema:   mysqlSchema,
 		MysqlUsername: mysqlUsername,
 		MysqlPassword: mysqlPassword,
+		MysqlCharset:  mysqlCharset,
 	}
 
 	//pretty json.
diff --git a/code/tool/util/util_string.go b/code/tool/util/util_string.go
index ed33275..ce85805 100644
--- a/code/tool/util/util_string.go
+++ b/code/tool/util/util_string.go
@@ -38,8 +38,14 @@ func GetMysqlUrl(
 	mysqlHost string,
 	mysqlSchema string,
 	mysqlUsername string,
-	mysqlPassword string) string {
-	return fmt.Sprintf("%s:%s@tcp(%s:%d)/%s?charset=utf8&parseTime=True&loc=Local", mysqlUsername, mysqlPassword, mysqlHost, mysqlPort, mysqlSchema)
+	mysqlPassword string,
+	mysqlCharset string) string {
+
+	if mysqlCharset == "" {
+		mysqlCharset = "utf8"
+	}
+
+	return fmt.Sprintf("%s:%s@tcp(%s:%d)/%s?charset=%s&parseTime=True&loc=Local", mysqlUsername, mysqlPassword, mysqlHost, mysqlPort, mysqlSchema, mysqlCharset)
 }
 
 //get random number 4.