for record in self:
    if record.model_id.model == 'hr.employee':
        employee_number_str = record.record_name
        str_list = employee_number_str.split(' /')
        employee_number = str_list[0]
        employee = record.env['hr.employee'].search([('employee_number','=',employee_number)])
        if employee:
            record['x_bgxxyg'] = employee.id