To travel from Chongqing Erlang Jurenzhai to the First Affiliated Hospital of Chongqing Medical University by bus, follow these steps:

1. Depart from Erlang Jurenzhai Bus Station.

2. Take bus line 812, 815, or 816.

3. Disembark at the stop for Chongqing Medical University.

4. Walk to the First Affiliated Hospital of Chongqing Medical University.

This route is efficient due to the direct bus lines connecting the two locations. According to the Chongqing Public Transport Authority, bus lines 812, 815, and 816 operate regularly between Erlang Jurenzhai and the medical university, providing a convenient and affordable mode of transportation. The journey typically takes around 30 minutes, depending on traffic conditions. This method is preferred by many due to its cost-effectiveness and the ease of access to both the bus station and the hospital.