diff --git a/parts/users.lua b/parts/users.lua
index c0af85d0..b6d14155 100644
--- a/parts/users.lua
+++ b/parts/users.lua
@@ -1,31 +1,40 @@
-local loadImage=love.graphics.newImage
-local fs=love.filesystem
-
-local texture_noImage=DOGC{32,32,
-	{"setCL",0,0,0},
-	{"fRect",0,0,32,32},
-	{"setCL",1,1,1},
-	{"setLW",3},
-	{"dLine",0,0,31,31},
-	{"dLine",0,31,31,0},
-}
-
-local function _getEmptyUser()
-	return{
-		username="[X]",
-		motto="Techmino haowan",
-		hash="",
-		new=false,
-	}
+local gc,fs=love.graphics,love.filesystem
+local function loadAvatar(path)
+	local img=gc.newImage(path)
+	local canvas=gc.newCanvas(128,128)
+	gc.push()
+		gc.origin()
+		gc.setColor(1,1,1)
+		gc.setCanvas(canvas)
+		mDraw(img,64,64,nil,128/math.max(img:getWidth(),img:getHeight()))
+		gc.setCanvas()
+	gc.pop()
+	return canvas
 end
 
+local texture_noImage=DOGC{120,120,
+	{"setCL",0,0,0},
+	{"fRect",0,0,120,120},
+	{"setCL",1,1,1},
+	{"setLW",6},
+	{"dLine",9,9,110,110},
+	{"dLine",9,110,110,9},
+}
+
 local db_img={}
 local db=setmetatable({},{__index=function(self,k)
 	local file="cache/user"..k..".dat"
-	local d=fs.getInfo(file)and JSON.decode(fs.read(file))or _getEmptyUser()
+	local d=
+		fs.getInfo(file)and JSON.decode(fs.read(file))or
+		{
+			username="[X]",
+			motto="Techmino haowan",
+			hash="",
+			new=false,
+		}
 	rawset(self,k,d)
-	if type(d.hash)=="string"and #d.hash>0 and fs.getInfo(d.hash)then
-		db_img[k].avatar=loadImage(d.hash)
+	if type(d.hash)=="string"and #d.hash>0 and fs.getInfo("cache/"..d.hash)then
+		db_img[k]=loadAvatar("cache/"..d.hash)
 	end
 	return d
 end})
@@ -39,12 +48,12 @@ function USERS.updateUserData(data)
 	fs.write("cache/user"..uid..".dat",JSON.encode{
 		username=data.username,
 		motto=data.motto,
-		hash=data.hash,
+		hash=data.hash or db[uid].hash,
 	})
 	if data.avatar then
-		fs.write("cache/"..data.hash,data.avatar:sub(data.avatar:find","+1))
-		db_img[uid].avatar=loadImage("cache/"..data.hash)
-		db[uid].hash=type(data.hash)=="string"and data.hash>0 and data.hash
+		fs.write("cache/"..data.hash,love.data.decode("string","base64",data.avatar:sub(data.avatar:find","+1)))
+		db_img[uid]=loadAvatar("cache/"..data.hash)
+		db[uid].hash=type(data.hash)=="string"and #data.hash>0 and data.hash
 		db[uid].new=true
 	end
 end