diff --git a/README.md b/README.md
index c43a3bd..1a34651 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,11 @@
 # pricing
 
-定价模块
\ No newline at end of file
+定价模块
+
+## 定价概念
+
+* 定价类型规范了一类业务的定价标准，并用定价类型规格细化定价名细
+* 定价项定义为什么定价，定价项目时序说明某个定价的有效时间段， 定价项规定了某个定价规格的具体定价和成本
+
+## 使用
+在资源中选择定价项目, 
diff --git a/json/pricing_program.json b/json/pricing_program.json
index 40011e7..ec49ff3 100644
--- a/json/pricing_program.json
+++ b/json/pricing_program.json
@@ -1,8 +1,7 @@
 {
-	"tblname": "pricing_program",
-	"title": "定价项目",
+	"tblname": "pricing_program_timing",
+	"title": "定价项目时序",
 	"params": {
-		"sortby": "name",
 		"logined_userorgid": "ownerid",
 		"browserfields": {
 			"exclouded": ["id", "ownerid" ],
@@ -13,7 +12,7 @@
 		],
 		"subtables":[
 			{
-				"field": "ppid",
+				"field": "pptid",
 				"title": "定价细项",
 				"icon": "{{entire_url('/pricing/imgs/pricing_item.svg')}}",
 				"subtable": "pricing_item"
diff --git a/json/pricing_program_timing.json b/json/pricing_program_timing.json
new file mode 100644
index 0000000..c465a16
--- /dev/null
+++ b/json/pricing_program_timing.json
@@ -0,0 +1,23 @@
+{
+	"tblname": "pricing_program",
+	"title": "定价项目",
+	"params": {
+		"sortby": "name",
+		"logined_userorgid": "ownerid",
+		"browserfields": {
+			"exclouded": ["id", "ownerid" ],
+			"alters": {}
+		},
+		"editexclouded": [
+			"id", "ownerid"
+		],
+		"subtables":[
+			{
+				"field": "ppid",
+				"title": "定价项目时序",
+				"icon": "{{entire_url('/pricing/imgs/pricing_program_timing.svg')}}",
+				"subtable": "pricing_program_timing"
+			}
+		]
+	}
+}
diff --git a/models/pricing_item.xlsx b/models/pricing_item.xlsx
index 1f014b7..22de7dc 100644
Binary files a/models/pricing_item.xlsx and b/models/pricing_item.xlsx differ
diff --git a/models/pricing_program.xlsx b/models/pricing_program.xlsx
index 640797c..0a971dd 100644
Binary files a/models/pricing_program.xlsx and b/models/pricing_program.xlsx differ
diff --git a/models/pricing_program_timing.xlsx b/models/pricing_program_timing.xlsx
new file mode 100644
index 0000000..1d75aca
Binary files /dev/null and b/models/pricing_program_timing.xlsx differ
diff --git a/pricing/pricing.py b/pricing/pricing.py
index 3ccb871..e1c7215 100644
--- a/pricing/pricing.py
+++ b/pricing/pricing.py
@@ -20,10 +20,26 @@ class PricingProgram:
 		self.pricing_type = await self.sor.R('pricing_type', 
 								{'id': self.ptid})
 
-	async def get_items(self):
-		recs = await self.sor.R('pricing_item', {'ppid': self.id})
+	async def get_items(self, biz_date=None):
+		if biz_date is None:
+			env = ServerEnv()
+			biz_date = await env.get_business_date(self.sor)
+		ppts = await self.get_program_timing(biz_date)
+		if lne(ppts) < 1:
+			return None
+		ppt = ppts[0]
+		recs = await self.sor.R('pricing_item', {'pptid': ppt.id})
 		return recs
 
+	async def get_program_timing(self, biz_date):
+		sql = """select * from pricing_program_timing
+where enabled_date >= ${biz_date}$
+	and expired_date < ${biz_date}$
+	and ppid = ${ppid}$
+	"""
+		return await self.sor.sqlExe(sql, {'ppid':self.ppid,
+											'biz_date': biz_date})
+
 	async def get_specs(self):
 		recs = await self.sor.R('pricing_spec', {'ptid': self.ptid})
 		return recs
@@ -57,7 +73,11 @@ async def get_remote_pricing(sor, charge, data):
 async def pricing_program_charging(sor, pricing_program_id, data):
 	pp = PricingProgram(pricing_program_id, sor)
 	await pp.init()
-	pp_items = await pp.get_items()
+	env = ServerEnv()
+	if not data.get('biz_date'):
+		biz_date = await env.get_business_date(self.sor)
+		data['biz_date'] = biz_date
+	pp_items = await pp.get_items(biz_date=data['biz_date'])
 	charges = []
 	for item in pp_items:
 		charge = item.copy()