diff --git a/yuthon_official/models/yuthon_sub_enterprises.py b/yuthon_official/models/yuthon_sub_enterprises.py
index ed365ee8f..98c52dbbd 100644
--- a/yuthon_official/models/yuthon_sub_enterprises.py
+++ b/yuthon_official/models/yuthon_sub_enterprises.py
@@ -6,7 +6,7 @@ from odoo.exceptions import ValidationError, UserError
 class YuthonSubEnterprises(models.Model):
     _name = 'yuthon.sub.enterprises'
     _description = '文件处理（子企业）'
-    _inherit = ['mail.thread.main.attachment', 'mail.activity.mixin']
+    _inherit = ['mail.thread.main.attachment', 'mail.activity.mixin', 'soong.workflow.mixin']
     _rec_name = 'name'