In thinkphp, how does one upload a data object to the master template using the template layout?

With the template layout enabled, I can only assign one data object assign to the subcontent page that inherits the template layout. With the template layout enabled, I can only assign one data object assign to the subcontent page that inherits the template layout.

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With the template layout enabled, I can only assign one data object assign to the subcontent page that inherits the template layout.

When a template is loaded and parsed, The subtemplate and the main template are merged into a template. The assign is used to bind data to the merged template.

Why do subtemplates go to the main template?

My problem description is not clear enough. Now, I can embed the php code in the main template without writing it in the controller.