diff --git a/src/gausskernel/dbmind/tools/common/types/misc.py b/src/gausskernel/dbmind/tools/common/types/misc.py
index fa7767d27..05060be83 100644
--- a/src/gausskernel/dbmind/tools/common/types/misc.py
+++ b/src/gausskernel/dbmind/tools/common/types/misc.py
@@ -12,7 +12,11 @@
 # See the Mulan PSL v2 for more details.
 from .root_cause import RootCause
 
-
+#Define anSlowQuery class thatSlow query accepts user input commands and performs operations on the database
+#method：Display the error content and suggestions, and retrieve suggestions provided by the system. If there are no suggestions, return “ no suggestions”
+#note：The property decorator turns a method into a property call.(root_causes、suggestions)
+#date：2022/8/4
+#contact：18365997821
 class SlowQuery:
     def __init__(self, db_host, db_port, db_name, schema_name, query, start_timestamp, duration_time,
                  hit_rate=None, fetch_rate=None, cpu_time=None, data_io_time=None, template_id=None, sort_count=None,