Can I take bus from Lanzhou to Bingling temple, and come back to Lanzhou west station before 5 pm?

Can I take a bus from Lanzhou to visit the Bingling grotto and then take a bus to come back to Lanzhou West station before 5 pm in the same day?

As I have booked a train from Lanzhou west railway station at 5 pm, is it ok to take a bus to visit Bingling grotto in the morning and take a bus back to Lanzhou west station before 5 pm in the same day?