Answered by Lynn from Australia | Jun. 24, 2014 22:51
The free shuttle buses are operated between the terra cotta army and the mausoleum only.
Tourism bus line 2 and the bus 307 are two different types of buses. It is hard to predict the frequency of bus line 307. Sometimes, you may just wait for several minutes, but sometimes, it will even take you around one hour! It takes you almost around two hours for taking bus line 307 to Ban Po.
Yes, returning to the city and then use the subway line may take long time, but the buses will be much easier to find and take. Or you can arrange the two sites in two days. You can visit the army in the morning and then visit some attractions in the city proper in the late afternoon and at night. Then head for Banpo by subway on the next morning ~~ Just for your reference.