diff --git a/discount/.init.py.swp b/discount/.init.py.swp
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index 0000000..b5465ae
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diff --git a/discount/init.py b/discount/init.py
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--- /dev/null
+++ b/discount/init.py
@@ -0,0 +1,137 @@
+from appPublic.qr import gen_qr
+from appPublic.uniqueID import getID
+from sqlor.dbpools import get_sor_context
+from ahserver.serverenv import ServerEnv
+from ahserver.filestorage import FileStorage
+
+async def discount_qrcode(request, params_kw):
+	"""
+	discount less then 1 and greate then 0
+	valid_term is digit + one of ["D", "M", "Y"]
+	expired_date is a date after it the promote qrcode invalidable
+	"""
+	discount = params_kw.discount
+	valid_term = params_kw.valid_term
+	expired_date = params_kw.expired_date
+	env = request._run_ns 
+	resellerid = await env.get_userorgid()
+	id = getID()
+	url = env.entire_url('./promote') + f'?id={id}'
+	fs = FileStorage()
+	p = fs._name2path(f'{getID()}.png')
+	gen_qr(url, p)
+	webp = fs.webpath(p)
+	async with get_sor_context(env, 'discount') as sor:
+		biz_date = await env.get_business_date(sor)
+		if biz_date <= expired_date:
+			raise Exception('Promote QRCODE is out of time')
+
+		ret = {
+			'id': id,
+			'resellerid': resellerid,
+			'discount': discount,
+			'valid_term': valid_term,
+			'expired_date': expired_date,
+			'qr_webpath': webp
+		}
+		await sor.C('discount_qr', Cret.copy())
+		return ret
+	return None
+async def set_promote_discount(request, params_kw):
+	env = request._run_ns
+	id = params_kw.id
+	customerid = await env.get_userorgid()
+	async with get_sor_context(env, 'discount') as sor:
+		recs = await sor.R('discount_qr', {'id': id})
+		if not recs:
+			raise Exception(f'promote id({id}) not exists')
+		biz_date = await env.get_business_date(sor)
+		if recs[0].expired_date <= biz_date:
+			raise Exception('Promote QRCODE is out of time')
+		cnt = int(recs[0].valid_term[:-1])
+		unit = recs[0].valid_term[-1]
+		enabled_date = biz_date
+		expired_date = ''
+		if unit == 'D':
+			expired_date = env.strdate_add(enabled_date, days=cnt)
+		elif unit == 'M':
+			expired_date = env.strdate_add(enabled_date, months=cnt)
+		elif unit == 'Y':
+			expired_date = env.strdate_add(enabled_date, years=cnt)
+		else:
+			raise Exception(f'Invalid valid_term({recs[0].valid_term})')
+		need_new_discount = await disable_old_discount(sor, recs[0].resellerid,
+				customerid, biz_date, recs[0].discount)
+		if not need_new_discount:
+			return
+		await sor.C('discount', {
+			'id': getID(),
+			'resellerid': recs[0].resellerid,
+			'customerid': customerid,
+			'discount': recs[0].discount,
+			'enabled_date': enabled_date,
+			'expired_date': expired_date
+		}
+		
+async def disable_old_discount(sor, resellerid, customerid, biz_date, new_discount):
+	sql = """select * from discount
+where resellerid = ${resellerid}$
+    and customerid=${customerid}$
+	and enabled_date <= ${biz_date}$
+    and expired_date > ${biz_date}$ for update"""
+	recs = await sor.sqlExe(sql, {'resellerid': resellerid, 'customerid': customerid, 'biz_date': biz_date})
+	if not recs:
+		return True
+	if new_discount > news[0].discount:
+		return False
+	await sor.U('discount', {'id': recs[0].id, 'expired_date': biz_date})
+	return True
+
+async def sor_get_star_discount(sor, resellerid, biz_date):
+	env = ServerEnv()
+	sql = """select * from discount 
+where resellerid = ${resellerid}$
+	and enabled_date <= ${biz_date}$
+	and expired_date > ${biz_date}$"""
+	ns = {
+		"resellerid": resellerid,
+		"biz_date": biz_date
+	}
+	recs = await sqlExe(sql, ns)
+	if not recs:
+		return 1
+	
+	return recs[0].discount
+
+
+async def sor_get_customer_discount(sor, resellerid, customerid):
+	env = ServerEnv()
+	biz_date = await env.get_business_date(sor)
+	sql = """select * from discount 
+where resellerid = ${resellerid}$
+	and customerid = ${customerid}$
+	and enabled_date <= ${biz_date}$
+	and expired_date > ${biz_date}$"""
+	ns = {
+		"resellerid": resellerid,
+		"customerid": customerid,
+		"biz_date": biz_date
+	}
+	recs = await sqlExe(sql, ns)
+	if not recs:
+		return await sor_get_star_discount(sor, resellerid, biz_date)
+	
+	return recs[0].discount
+
+async def get_customer_discount(resellerid, customerid):
+	env = ServerEnv()
+	async with get_sor_context(env, 'discount') as sor:
+		return sor_get_customer_discount(sor, resellerid, customerid)
+	return 1
+
+def load_discount():
+	env = ServerEnv()
+	env.get_customer_discount = get_customer_discount
+	env.sor_get_customer_discount = sor_get_customer_discount
+	env.discount_qrcode = discount_qrcode
+	env.set_promote_discount = set_promote_discount
diff --git a/models/discount.xlsx b/models/discount.xlsx
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diff --git a/models/discount_qr.xlsx b/models/discount_qr.xlsx
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index 0000000..f21104c
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diff --git a/wwwroot/generate_qr.dspy b/wwwroot/generate_qr.dspy
new file mode 100644
index 0000000..5bc6ee9
--- /dev/null
+++ b/wwwroot/generate_qr.dspy
@@ -0,0 +1,58 @@
+params_kw.discount = float(params_kw.discount)
+if params_kw.discount <= 0 or params_kw.discount >= 1:
+	e = Exception(f'discount({params_kw.discount}) invalid')
+	exception(f'{e}')
+	raise e
+
+if params_kw.valid_term[-1] not in ['D', 'M', 'Y']:
+	e = Exception(f'valid_term must ends with "D", "M" or "Y"')
+	exception(f'{e}')
+	raise e
+cnt = int(params_kw.valid_term[:-1])
+if cnt < 0:
+	e = Exception(f'valid_term({params_kw.valid_term}) invalid')
+	exception(f'{e}')
+	raise e
+
+if not params_kw.expired_date:
+	params_kw.expired_date = '9999-12-31'
+x = await discount_qrcode(request, params_kw)
+return {
+	"widgettype": "VBox",
+	"options": {
+		"width": "100%",
+		"height": "100%"
+	},
+	"subwidgets": [
+		{
+			"widgettype": "Image",
+			"options": {
+				"width": "auto",
+				"height": "auto",
+				"url": entire_url('/idfile') + f'?path={x.qr_webpath}'
+			}
+		}, {
+			"widgettype": "HBox",
+			"options": {
+				"width": "100%",
+				"cheight": 2
+			},
+			"subwidgets": [
+				{
+					"widgettype": "Text",
+					"options": {
+						"otext": "折扣:",
+						"i18n": True,
+						"cwidth": 3
+					}
+				},{
+					"widgettype": "Text",
+					"options":{
+						"text": x.discount
+					}
+				}
+			]
+		}
+	]
+}
+
diff --git a/wwwroot/promote.ui b/wwwroot/promote.ui
new file mode 100644
index 0000000..6d91df8
--- /dev/null
+++ b/wwwroot/promote.ui
@@ -0,0 +1,37 @@
+{
+	"widgettype": "Form",
+	"options": {
+		"width": "100%",
+		"height": "100%",
+		"fields": [
+			{
+				"name": "valid_term",
+				"label": "有效期",
+				"uitype": "str",
+				"tip":"格式：xY, xM, xD,x是1到多位数字，Y（年），M（月），D（日）"
+			},{
+				"name": "expired_date",
+				"label": "促销失效日期",
+				"uitype": "date",
+				"tip": "促销二维码需在此日期前使用"
+			},{
+				"name": "discount",
+				"lable": "折扣",
+				"uitype": "float",
+				"tip": "折扣>0, < 1, 最终价格=产品价格*折扣， 折扣越小，折扣力度越大"
+			}
+		]
+	},
+	"binds":[
+		{
+			"wid": "self",
+			"event": "submit",
+			"actiontype": "urlwidget",
+			"target": "self",
+			"options": {
+				"url": "{{entire_url('generate_qr.dspy')}}",
+				"params": {}
+			}
+		}
+	]
+}
diff --git a/wwwroot/promote/index.dspy b/wwwroot/promote/index.dspy
new file mode 100644
index 0000000..583deae
--- /dev/null
+++ b/wwwroot/promote/index.dspy
@@ -0,0 +1,5 @@
+orgid = await get_userorgid()
+if orgid is None:
+	return UiError(title='Error', message='You need login')
+	
+ret = await set_promote_discount(request, params_kw)