diff --git a/README.md b/README.md
index 4efae97..f82da17 100755
--- a/README.md
+++ b/README.md
@@ -45,15 +45,30 @@ see requirements.txt
 
 [sqlor](https://github.com/yumoqing/sqlor)
 
-## How to use
-see ah.py
+## Usage
 
 ```
-from ahserver.configuredServer import ConfiguredServer
+import asyncio
+from ahserver.webapp import webapp
+from ahserver.configuredServer import add_startup
+
+# task running all the time in background
+async def bgwork(app) -> None:
+	while True:
+		asyncio.sleep(sec)
+		print('hahaha')
+
+def get_module_dbname(modulename):
+	return 'test'
+
+def init():
+	env = ServerEnv()
+	# add background task
+	add_startup(bgwork(10))
+	env.get_module_dbname = get_module_dbname
 
 if __name__ == '__main__':
-	server = ConfiguredServer()
-	server.run()
+	webapp(init)
 ```
 
 ## Folder structure
diff --git a/ahserver/configuredServer.py b/ahserver/configuredServer.py
index ff90e7f..df1a352 100644
--- a/ahserver/configuredServer.py
+++ b/ahserver/configuredServer.py
@@ -130,3 +130,4 @@ class ConfiguredServer:
 							processors=config.website.processors)
 			self.app.router.register_resource(res)
 	
+
diff --git a/ahserver/globalEnv.py b/ahserver/globalEnv.py
index 14a4c8e..f5264d8 100644
--- a/ahserver/globalEnv.py
+++ b/ahserver/globalEnv.py
@@ -38,7 +38,6 @@ from openpyxl import Workbook
 from tempfile import mktemp
 
 from appPublic.jsonConfig import getConfig
-from appPublic.myTE import string_template_render
 from appPublic.dictObject import DictObject
 from appPublic.Singleton import GlobalEnv
 from appPublic.argsConvert import ArgsConvert
@@ -323,7 +322,6 @@ def initEnv():
 	g.StreamHttpClient = StreamHttpClient
 	g.server_error = server_error
 	g.FileStorage = FileStorage
-	g.str_tmpl_render = string_template_render
 	g.downloadfile2url = downloadfile2url
 	g.background_reco = background_reco
 	g.get_sor_context = get_sor_context