Is it better to use EMS or a courier company to mail the political audit materials? Like Shentong Express? Please help!

1, express: usually we call the private courier courier, such as Shentong, Yuantong, Rhyme, Daily Express and so on. These private courier usually cover the urban areas, generally do not go to remote villages. City courier is generally every other day, cross-regional generally 3-4 days can be delivered, generally door-to-door pickup and delivery, but now the private courier service is still relatively unsatisfactory, lost pieces, wrong pieces more. Advantages: fast, low fees. Cons: poor service. 2, ordinary mail: very traditional mail, suitable for large and non-urgent pieces, need to pick up and deliver the mail to the post office. The network covers any area of the country. Advantages: low charge, full network, better service. Disadvantages: slow, generally 7-14 days or longer. 3, EMS: postal express mail, covering the whole country, high charges, better service. Time and private courier roughly the same.