diff --git a/doc/界面原型.bmpr b/doc/界面原型.bmpr
new file mode 100644
index 0000000..6dd42bb
Binary files /dev/null and b/doc/界面原型.bmpr differ
diff --git a/doc/运维语句.sql b/doc/运维语句.sql
index e848d92..744384d 100644
--- a/doc/运维语句.sql
+++ b/doc/运维语句.sql
@@ -32,7 +32,7 @@ ORDER BY last_received_time DESC
 // 查找未分配顾问的会话
 SELECT *
 FROM whatsapp_session
-WHERE opi_sn IS null
+WHERE opi_sn IS NULL OR opi_sn = 0
 
 // 查找 WA 号码不一致
 SELECT *