diff --git a/wwwroot/billing.dspy b/wwwroot/billing.dspy
index 0f327c9..35f20db 100644
--- a/wwwroot/billing.dspy
+++ b/wwwroot/billing.dspy
@@ -27,7 +27,9 @@ where a.orgid = ${orgid}$
 	and d.acc_date >= ${start_date}$
 	and d.acc_date <= ${end_date}$"""
 	rows = await sor.sqlExe(sql, ns)
-	debug(f'billing rows type={type(rows).__name__}, is_list={isinstance(rows, list)}, len={len(rows) if isinstance(rows, list) else "N/A"}')
+	if not isinstance(rows, list):
+		rows = list(rows) if rows else []
+	debug(f'billing rows type={type(rows).__name__}, len={len(rows)}')
 	
 	# 统计数据 — 独立 ns 避免被 sqlor 修改
 	stats_ns = {
@@ -52,8 +54,8 @@ where a.orgid = ${orgid}$
 		'credit_sum': float(stats_recs[0].credit_sum) if stats_recs else 0
 	}
 	result = {
-		'total': len(rows) if isinstance(rows, list) else 0,
-		'rows': rows if isinstance(rows, list) else [],
+		'total': len(rows),
+		'rows': rows,
 		'stats': stats
 	}
 	return json.dumps(result, ensure_ascii=False, default=str)