This is a ticket for 13th line.It costs 3RMB orginally.

Another way, a less expensive way, to get this ticket is to barter for it by the half ticket which costs 5RMB as a whole.

So it is a better idea to buy a 5RMB ticket, get on subway 1st line or 2nd line, and change the line to 13th line. You can save yourself 1RMB.

これは、５元のチケット。１号線ないし２号線で入札する際には、該当部分（青色）のみを契って貰う。

残りの半券は自分で保管しておく。乗換駅に着いたら、出口でのチケット確認は無いので、そのまま改札をでる。１３号線の改札は歩いて数分のところにある。１３号線の改札に入る前に、保管しておいた半券（黄色部分）を使用するので、なくさないように。

半券をなくした場合は、再度３元を払ってチケットを買うことになるので、差額で１元損することになる。

（３元＋３元）－５元＝１元。

You can also check the fee of subway at station.

本线（1，2号线）票价3元
…The fee for this line(1st or 2nd line) is 3RMB per a ticket.
换乘八通线票价4元
…The fee for this line(1st or 2nd line) is 3RMB per a ticket.
换乘13通线票价5元
…The fee for this line(1st or 2nd line) is 3RMB per a ticket.
请您当面点清票款
…Please make sure that you have a right ticket and change here.

I recommend you check the line in the Beijing Subway System website.
http://www.bjsubway.com/chinese_ver/cczn/dtxlt.asp

Ticket Office

Now you are at a ticket office “售票处”.

Check the route you are going to go through and the station you are to go. If the 1st line or 2nd line is your only line you are to use, making a payment 3RMB would be OK. In the case of transferring line to 8th line, you are expected to pay 4RMB. Transfer 13th line? Just pay 5RMB.

How to use Beijing subway system

First you must find out a entrance of a station. You are just looking for the mark D, which is initial letter of the Chinese word “ditie地铁”.

Then go to a ticket office “售票处” to get your ticket.