MsSql Grammar quoteString don't auto add 'N'

I use Laravel 5.8 to insert row to MsSQL database

Model::insert([
  'name' => '中文字'
]);

The output SQL is

insert into table_name (name) values ('中文字')

But it’s miss N char before string character.
How to set N before string character by auto. Like this

insert into table_name (name) values (N'中文字')