diff --git a/models/llm_usage.json b/models/llm_usage.json
index effb56c..a0e6182 100644
--- a/models/llm_usage.json
+++ b/models/llm_usage.json
@@ -78,7 +78,7 @@
     },
     {
       "name": "project_id",
-      "title": "项目ID(sd_projects.id;'0'=非项目调用,按项目统计费用,查询不传=不区分项目)",
+      "title": "项目ID(sd_projects.id; 0=非项目调用哨兵值,按项目统计费用,查询不传=不区分项目)",
       "type": "str",
       "length": 32,
       "nullable": "no",