diff --git a/dat/qwen3.7-max.txt b/dat/qwen3.7-max.txt
new file mode 100644
index 0000000..f07f135
--- /dev/null
+++ b/dat/qwen3.7-max.txt
@@ -0,0 +1,53 @@
+    已生成完整的 qwen3.7-max 配置SQL。以下是配置方案：
+    
+    模型摘要
+    - 模型名称: 千问3.7-Max
+    - API model: qwen3.7-max (严格按API文档填写)
+    - 分类: text2text (文生文)
+    - 供应商: 阿里百炼 (ali-qwen)
+    - 接口: OpenAI兼容 /chat/completions，同步流式
+    
+    复用vs新建
+    - upapp: 复用 ali-qwen (阿里百炼)
+    - upappkey: 复用 gCMl-BnrTrfoqWAEPPoH8 (API Key已配置)
+    - uapi: 复用 t2t (BY2cA4RD_axNxTG4m9Coa)
+    - uapiio: 复用 Is8l4TGkcZcqFSjbbeIK2 (文本会话)
+    - llm: 新建
+    - llm_api_map: 新建
+    - pricing_program: 新建
+    - pricing_program_timing: 新建
+    
+    生成的SQL (4条)
+    
+    sql
+    -- 1. llm表
+    INSERT INTO llm VALUES ('Jt26VKlUFsJxABuVLauBc','千问3.7-Max','qwen3.7-max','通义千问3.7系列旗舰模型，相较3.6版本在推理能力、代码能力、多模态理解等方面全面升级。适用于复杂任务处理、智能体开发、代码生成等高级应用场景。','text2text','qwen','ali-qwen','t2t','6fadgewjraOyvxC_EkHou','0','2026-05-23','9999-12-31','',NULL,10.00);
+    
+    -- 2. llm_api_map表
+    INSERT INTO llm_api_map VALUES ('rFS0Ag-epBUxE5LCF6glW','Jt26VKlUFsJxABuVLauBc','text2text','t2t',NULL,NULL,'0B-JNSUEelsY5TQ_Sawa7','1');
+    
+    -- 3. pricing_program表
+    INSERT INTO pricing_program VALUES ('0B-JNSUEelsY5TQ_Sawa7','qwen3.7-max定价','fields:\r\n  formula:\r\n    label: 计算公式\r\n    type: str\r\n  model:\r\n    label: 模型\r\n    type: str\r\n  prompt_tokens:\r\n    label: 输入词元数\r\n    type: int\r\n    value_mode: between\r\nformula: null\r\npricings:\r\n- formula: 2.5  prompt_tokens / 1000000 + completion_tokens  10 /1000000\r\n  model: qwen3.7-max\r\n  prompt_tokens: -0.1 ~= 32000\r\n- formula: 4  prompt_tokens / 1000000 + completion_tokens  16 /1000000\r\n  model: qwen3.7-max\r\n  prompt_tokens: 32000 ~= 128000\r\n- formula: 7  prompt_tokens / 1000000 + completion_tokens  28 /1000000\r\n  model: qwen3.7-max\r\n  prompt_tokens: 128000 ~= 256000\r\n- formula: 10  prompt_tokens / 1000000 + completion_tokens  40 /1000000\r\n  model: qwen3.7-max\r\n  prompt_tokens: 256000 ~= 1000000','2026-05-23','9999-12-31');
+    
+    -- 4. pricing_program_timing表
+    INSERT INTO pricing_program_timing VALUES ('C-IIEG_9_O9beN8S2vdUI','0B-JNSUEelsY5TQ_Sawa7','qwen3.7-max计费','fields:\r\n  formula:\r\n    label: 计算公式\r\n    type: str\r\n  model:\r\n    label: 模型\r\n    type: str\r\n  prompt_tokens:\r\n    label: 输入词元数\r\n    type: int\r\n    value_mode: between\r\nformula: null\r\npricings:\r\n- formula: 2.5  prompt_tokens / 1000000 + completion_tokens  10 /1000000\r\n  model: qwen3.7-max\r\n  prompt_tokens: -0.1 ~= 32000\r\n- formula: 4  prompt_tokens / 1000000 + completion_tokens  16 /1000000\r\n  model: qwen3.7-max\r\n  prompt_tokens: 32000 ~= 128000\r\n- formula: 7  prompt_tokens / 1000000 + completion_tokens  28 /1000000\r\n  model: qwen3.7-max\r\n  prompt_tokens: 128000 ~= 256000\r\n- formula: 10  prompt_tokens / 1000000 + completion_tokens  40 /1000000\r\n  model: qwen3.7-max\r\n  prompt_tokens: 256000 ~= 1000000','2026-05-23','9999-12-31');
+    
+    
+    验证查询
+    sql
+    SELECT id, name, model, upappid, apiname FROM llm WHERE model = 'qwen3.7-max';
+    SELECT id, llmid, llmcatelogid, apiname, ppid FROM llm_api_map WHERE llmid = 'Jt26VKlUFsJxABuVLauBc';
+    SELECT id, name FROM pricing_program WHERE id = '0B-JNSUEelsY5TQ_Sawa7';
+    
+    
+    ppid三处一致
+    - pricing_program.id = 0B-JNSUEelsY5TQ_Sawa7
+    - pricing_program_timing.ppid = 0B-JNSUEelsY5TQ_Sawa7
+    - llm_api_map.ppid = 0B-JNSUEelsY5TQ_Sawa7
+    
+    注意事项
+    1. 定价参考qwen3.6-plus的阶梯式计费模式，具体价格需根据百炼官方定价调整
+    2. qwen3.7-max使用已有的t2t uapi，OpenAI兼容接口
+    3. 如果qwen3.7-max有特殊的推理模式（如思考/非思考切换），可能需要额外的配置
+    4. 之前提到的 startReasoning is not defined 前端报错问题需要单独排查，可能与harnessed_reasoning的bricks前端代码有关
+
diff --git a/llmage/__pycache__/accounting.cpython-310.pyc b/llmage/__pycache__/accounting.cpython-310.pyc
new file mode 100644
index 0000000..efd3830
Binary files /dev/null and b/llmage/__pycache__/accounting.cpython-310.pyc differ
diff --git a/llmage/accounting.py b/llmage/accounting.py
index e076826..ef9087a 100644
--- a/llmage/accounting.py
+++ b/llmage/accounting.py
@@ -1,7 +1,7 @@
 import asyncio
 import json
 import time
-from datetime import datetime
+from datetime import datetime, timedelta
 from appPublic.log import exception, debug
 from appPublic.uniqueID import getID
 from appPublic.dictObject import DictObject
@@ -239,20 +239,18 @@ async def llm_accoung_failed(luid, reason=None):
 			await sor.C('llmusage_accounting_failed', failed_rec)
 
 
-async def backup_accounted_llmusage():
-	"""Backup accounted records with use_date before today to history table."""
+async def backup_accounted_llmusage(cutoff_date):
+	"""Backup accounted records with use_date < cutoff_date to history table."""
 	env = ServerEnv()
-	today = datetime.now().strftime('%Y-%m-%d')
 	ts = env.timestampstr()
 	batched = 0
 	async with get_sor_context(env, 'llmage') as sor:
-		# Select records with use_date < today (i.e. yesterday and earlier)
 		sql = """select * from llmusage 
 where accounting_status='accounted' 
-	and use_date < ${today}$"""
-		recs = await sor.sqlExe(sql, {'today': today})
+	and use_date < ${cutoff_date}$"""
+		recs = await sor.sqlExe(sql, {'cutoff_date': cutoff_date})
 		if not recs:
-			debug(f'backup_accounted_llmusage: no records to backup for use_date < {today}')
+			debug(f'backup_accounted_llmusage: no records to backup for use_date < {cutoff_date}')
 			return 0
 		debug(f'backup_accounted_llmusage: {len(recs)} records to backup')
 		for r in recs:
@@ -280,7 +278,7 @@ where accounting_status='accounted'
 			# Delete from main table
 			await sor.D('llmusage', {'id': r.id})
 			batched += 1
-	debug(f'backup_accounted_llmusage: backed up {batched} records')
+	debug(f'backup_accounted_llmusage: backed up {batched} records for use_date < {cutoff_date}')
 	return batched
 
 
@@ -335,14 +333,13 @@ order by failed_time desc limit {page_size} offset {offset}"""
 async def backend_accounting():
 	env = ServerEnv()
 	debug(f'backend accounting started ...')
-	backup_counter = 0
+	last_backup_date = None
 	while True:
 		try:
 			lus = await get_accounting_llmusages()
 		except Exception as e:
 			exception(f'{e}')
 			lus = []
-		# debug(f'{len(lus)=} need to accounting........')
 		for lu in lus:
 			try:
 				tpac = await get_user_tpac(lu.userid)
@@ -356,12 +353,14 @@ async def backend_accounting():
 				exception(f'{e}, {lu.id=}')
 				await llm_accoung_failed(lu.id, reason=str(e))
 
-		# Run backup every 30 iterations (~5 minutes)
-		backup_counter += 1
-		if backup_counter >= 30:
-			backup_counter = 0
+		# Check if date changed, trigger backup once per day
+		today = datetime.now().strftime('%Y-%m-%d')
+		if today != last_backup_date:
+			yesterday = (datetime.now() - timedelta(days=1)).strftime('%Y-%m-%d')
+			last_backup_date = today
 			try:
-				await backup_accounted_llmusage()
+				debug(f'date changed to {today}, triggering backup for use_date < {yesterday}')
+				await backup_accounted_llmusage(yesterday)
 			except Exception as e:
 				exception(f'backup_accounted_llmusage failed: {e}')
 
diff --git a/models/llmusage.json b/models/llmusage.json
index 7d0f6ca..3371734 100644
--- a/models/llmusage.json
+++ b/models/llmusage.json
@@ -123,6 +123,14 @@
             "idxfields": [
                 "userid"
             ]
+        },
+        {
+            "name": "idx_llmusage_accounting",
+            "idxtype": "index",
+            "idxfields": [
+                "accounting_status",
+                "use_date"
+            ]
         }
     ]
 }
\ No newline at end of file
diff --git a/scripts/migrate_llmusage_history.sql b/scripts/migrate_llmusage_history.sql
index 5c30e0c..9bebf84 100644
--- a/scripts/migrate_llmusage_history.sql
+++ b/scripts/migrate_llmusage_history.sql
@@ -69,6 +69,9 @@ CREATE INDEX idx_laf_llmid ON llmusage_accounting_failed(llmid);
 CREATE INDEX idx_laf_handled ON llmusage_accounting_failed(handled);
 CREATE INDEX idx_laf_failed_time ON llmusage_accounting_failed(failed_time);
 
+-- 3. 为 llmusage 表添加组合索引（优化备份查询: accounting_status + use_date）
+CREATE INDEX idx_llmusage_accounting ON llmusage(accounting_status, use_date);
+
 -- ============================================================
 -- 验证步骤（执行后运行）:
 -- 1. 确认表创建成功: