diff --git a/src/memos/api/handlers/chat_handler.py b/src/memos/api/handlers/chat_handler.py
index 42968d2c9..ba98a06a9 100644
--- a/src/memos/api/handlers/chat_handler.py
+++ b/src/memos/api/handlers/chat_handler.py
@@ -505,12 +505,12 @@ def generate_chat_response() -> Generator[str, None, None]:
 
                     # Filter memories by threshold, min_num is the min number of memories for playground
                     second_filtered_memories = self._filter_memories_by_threshold(
-                        memories_list, min_num=15
+                        memories_list, min_num=30
                     )
 
                     # dedup and supplement memories
                     fast_length = len(filtered_memories)
-                    supplement_length = max(0, 25 - fast_length)  # 25 is the max mem for playground
+                    supplement_length = max(0, 50 - fast_length)  # 50 is the max mem for playground
                     filtered_memories = self._dedup_and_supplement_memories(
                         filtered_memories, second_filtered_memories
                     )[:supplement_length]
diff --git a/src/memos/templates/mos_prompts.py b/src/memos/templates/mos_prompts.py
index 0c7c531e9..20a07ea3f 100644
--- a/src/memos/templates/mos_prompts.py
+++ b/src/memos/templates/mos_prompts.py
@@ -115,7 +115,7 @@
 - When using facts from memories, add citations at the END of the sentence with `[i:memId]`.
 - `i` is the order in the "Memories" section below (starting at 1). `memId` is the given short memory ID.
 - Multiple citations must be concatenated directly, e.g., `[1:sed23s], [
-2:1k3sdg], [3:ghi789]`. Do NOT use commas inside brackets. Do not use wrong format like `[def456]`.
+2:1k3sdg], [3:ghi789]`. Do NOT use commas inside brackets. Do not use wrong format like `[def456]`, `[1]` etc.
 - Cite only relevant memories; keep citations minimal but sufficient.
 - Do not use a connected format like [1:abc123,2:def456].
 - Brackets MUST be English half-width square brackets `[]`, NEVER use Chinese full-width brackets `【】` or any other symbols.
@@ -222,7 +222,7 @@
 - 使用记忆中的事实时，在句尾添加引用格式`[i:memId]`。
 - `i`是下面"记忆"部分中的顺序（从1开始）。`memId`是给定的短记忆ID。
 - 多个引用必须直接连接，例如，`[1:sed23s], [
-2:1k3sdg], [3:ghi789]`。不要在方括号内使用逗号。不要使用错误格式如`[def456]`。
+2:1k3sdg], [3:ghi789]`。不要在方括号内使用逗号。不要使用错误格式如`[def456]`, `[1]`等。
 - 只引用相关记忆；保持引用最少但充分。
 - 不要使用连接格式如[1:abc123,2:def456]。
 - 方括号必须是英文半角方括号`[]`，绝不使用中文全角括号`【】`或任何其他符号。