diff --git a/src/config/database.js b/src/config/database.js
index a04b941..3c11106 100644
--- a/src/config/database.js
+++ b/src/config/database.js
@@ -5,6 +5,19 @@ let db;
 
 const requiredConfig = ['DB_HOST', 'DB_PORT', 'DB_NAME', 'DB_USER', 'DB_PASSWORD'];
 
+// MySQL (strict mode) rejects ISO date strings with a time zone, e.g. "2026-10-19T06:55:53.409Z", in DATETIME
+// columns. The models and the content ingest service write such strings, so they are turned into plain local
+// date-times here. The server and MySQL both run on China time, which is how the existing rows are stored.
+const ISO_DATETIME = /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\.\d+)?(Z|[+-]\d{2}:\d{2})$/;
+const pad = (value) => String(value).padStart(2, '0');
+const toMySqlParam = (value) => {
+  if (typeof value !== 'string' || !ISO_DATETIME.test(value)) return value;
+  const date = new Date(value);
+  if (Number.isNaN(date.getTime())) return value;
+  return `${date.getFullYear()}-${pad(date.getMonth() + 1)}-${pad(date.getDate())} `
+    + `${pad(date.getHours())}:${pad(date.getMinutes())}:${pad(date.getSeconds())}`;
+};
+
 class MySqlStatement {
   constructor(connection, sql) {
     this.connection = connection;
@@ -12,7 +25,7 @@ class MySqlStatement {
   }
 
   all(...params) {
-    const result = this.connection.query(this.sql, params);
+    const result = this.connection.query(this.sql, params.map(toMySqlParam));
     return Array.isArray(result) ? result : [];
   }
 
@@ -22,7 +35,7 @@ class MySqlStatement {
   }
 
   run(...params) {
-    const result = this.connection.query(this.sql, params) || {};
+    const result = this.connection.query(this.sql, params.map(toMySqlParam)) || {};
     return {
       changes: result.affectedRows || 0,
       lastInsertRowid: result.insertId || 0,
@@ -83,4 +96,4 @@ const closeDb = () => {
   }
 };
 
-module.exports = { getDb, closeDb };
+module.exports = { getDb, closeDb, toMySqlParam };