Option 1 can be in Yangjiaping Zoo, next to a long-distance bus station, and you can take a bus to Bishan. The fare seems to be 10 yuan, but it takes about 2 hours to walk. After Bishan, there is no bus to Jin Jian Primary School, which is far away. It is best to take a taxi (around 5 yuan), or at most, ride a motorcycle or go to human tricycles (4 yuan).

Option 2: You can go to Chen Jiaping coach station and take a long-distance bus to Bishan (take the expressway), which costs more than 20 yuan. Shortly after getting off at Tianmen Station in Bishan. At the gate of the station, there are many people on the tricycle (2 yuan).