Administrative guidance means that within the scope of matters under its jurisdiction, the national administrative organs, for specific citizens, enterprises, social groups, etc. , formulate inductive regulations, policies, plans, and other regulatory documents and adopt specific models, recommendations, and advice , Encourage, advocate, limit, and other non-mandatory methods, supplemented by interest inducement, urge the counterpart to voluntarily do or not to perform certain actions in order to achieve certain administrative purposes. Which of the following are administrative guidance. ['Family planning.', 'Restraining skyrocketing prices.', 'Ban smoking in public.', 'Traffic rules.']