12306 how to buy the lower berth?

Many people find that there are no sleeping cars when they buy tickets online at 12306, but when the train arrives at the station, you will find that many sleeping cars are empty. Why can't I buy an empty sleeper? Because all stations where a train passes have reserved sleepers and seats, he can't ask people at a station to sell all the seats and allocate seats according to the passenger flow of the station and the size of the city. Knowing the logic of the seat, we can get it. In this case, you can consider buying more or shorting. When you find that the bus you bought has no sleeper, you can choose which station to go to or which station to get off, and choose some bigger stations. If your station is near the departure station, you can buy it directly from the departure station. There will be a great chance of a sleeper. Although it cost a lot of money, it is better than not buying a sleeper.

Let's talk about how to have a good chance to buy a lower berth (enough tickets in advance)

First of all, if you go to the window, the conductor in the lower berth will give you a ticket (I will give it to you every time I buy a ticket). On the premise of this train (sufficient ticket source), many people can't buy the lower berth on the internet 12306. When I got on the bus, I found that many lower bunks were empty. Why can't I buy it? At present, the railway has restrictions on the lower berth right of the elderly, but how can we buy it if we are not the elderly? If you buy a sleeper, he will give you a big chance of middle berth, a small chance of upper berth and a small chance of lower berth. When buying two tickets, it is very likely that two tickets are on the same page, or two tickets are on the same page. When you buy three tickets, it is very likely that you have all the tickets. According to this logic, if you travel alone, you can buy three or four tickets together, put your name at the front, and then you can use the rest of your family or friends, so the chances of giving you a lower berth are high, because your name is at the front, that is, your lower berth. Pay directly, and then refund the remaining extra tickets. There is no handling fee for refunding tickets before the specified time limit.