What do you mean by "surface mail" and "express delivery" respectively?

There are generally three ways to send mail to the post office, each with its own advantages: \x0d\ 1. Surface mail. It's just an ordinary parcel. It takes a long time, but it's cheap. It usually takes 7- 15 days to arrive, and the cost is between 4-8 yuan. \x0d\ Uncle postman will send you a parcel receipt, just like an ordinary letter, and then you can take this receipt and ID card to the designated post office to pick it up. \x0d\2. Express delivery by post office. Generally, post offices call it China Post, because the speed is not the fastest and the price is slightly more expensive than private express delivery, which is generally around 10- 15 yuan (not overweight). It usually takes about 5 days to get there. It's delivered to your door. \x0d\3. Emergency medical service. Post office staff call it express delivery, which is really fast, and it will arrive in 2-3 days, but such a fast speed comes at a price-a lot of money. If it is not overweight, the country is divided into three regions, so there are three prices altogether. About 26-32-38.