The disadvantage is: expensive! At least the first weight to 10 dollars, commonly 12-18, the renewal weight in 8-12 dollars, if it is SF, DHL, House Express, EMS and so on more expensive. A desktop plus 15 kilograms of packaging, charge a hundred dollars is very normal. (Last year I couriered two toolboxes containing tools to Shanghai, a few dozen kilograms, and the courier fee was settled at 800+, luckily the company paid the bill -_-!)
China Railway Express and the like are basically considered logistics.
The advantages are: much cheaper ---- relative to the courier
The disadvantages are: some slower than the courier, the goods have to pick up and deliver by themselves (on the point of freight, surely no one to deliver the goods), if the goods are too light is not cost-effective (logistics is generally go the starting weight, and the cab's starting price is about the same, less than how many kilograms are always in accordance with the minimum starting weight charges, often 10-50 kilograms, charges 30-100 ranging) etc., the charges vary from 30-100.)
***With the disadvantages: remember to remove the hard disk in advance, this thing is really not fall ah, and more to your computer package a few layers of boxes, taking into account the computer may be subjected to: fall, touch, accumulation, pressure, bump, knock, shake, roll, and irregular movement, and fully experience Newton's three laws of motion, and so on. The internal boards of your computer will also be fully tested for soldering quality and mounting strength. It is highly recommended that you wrap your computer in two layers of soft packaging, then in hard packaging, and finally in two layers of soft packaging. ...... Maybe another accident insurance policy would be good?
Well, finally, I wish you a safe home for your computer: when you go out, you should bring your laptop in the future.