diff --git a/sample/projection.lua b/sample/projection.lua
new file mode 100644
index 0000000..eda7403
--- /dev/null
+++ b/sample/projection.lua
@@ -0,0 +1,48 @@
+
+local function init_func(env)
+
+	local config=env.engine.schema.config
+    -- load ConfigList  form  path
+	local proedit_fmt_list = conifg:get_list("translastor/preedit_format")
+	-- print value 
+	for i=0,proedit_fmt_list.size do 
+		print(i,  proedit_fmt_list:get_value_at(i).value)
+	end 
+	--   create Projection obj
+	local p1=Projection()
+	p1:load(proedit_fmt_list)
+    
+	--  user create  Projection obj
+	local pfl2= ConfigList()
+	-- create ConfigValue    &  ConfigList  ust isnert( index, ConfigValue)  append()
+	local v1= ConfigValue("xlit|abc|xyz|")
+	pfl2:append(v1)
+	pfl2:append( ConfigValue("xlit|def|tuv|"))
+	pfl2:insert(1,ConfigValue("xlit|ghi|qrs|"))
+	local p2=Projection()
+	p2:load(pfl2)
+	local str1= "abcdefg"
+	--   
+	print(str1 , p1:apply(str1), p2:apply(str1) )
+	--  
+	env.p1=p1
+	env.p2=p2
+end 
+local function func(input,seg,env)
+	for cand in input:iter() do 
+		cand.comment=  env.p1(cand.comment) .. env.p2(cand.comment)
+		yield(cand)
+	end
+end
+
+
+return { init=init_func, func=func } 
+---   rime.lua    
+--   projection_filter= require("projection.lua")
+--
+--
+--   schema.yaml
+--   insert to /engine/filter
+--   lua_filter@projection_filter
+--
+