The tour guide recommended the following:

1. Zhazidong is not far from Baigongguan, so you can get there quickly on foot or by local transportation. These two scenic spots were prisons and concentration camps set up by the Kuomintang during the War of Resistance against Japanese Aggression period to imprison and persecute revolutionaries and Democrats.

2. Tour route: To visit the dregs cave, it is suggested to start from Baigongguan and go straight along the path up the mountain, and you can see the dregs cave. You can choose to walk or take local transportation to get there.

3. Features of scenic spots: Zhazidong is a small concentration camp with relatively simple cells and facilities, but its persecution is no less than that of Bai Mansion.

4. Precautions for visiting: When visiting Zhazidong, please pay attention to the following points: Please respect the historical relics and facilities in the scenic area, and don't touch or destroy the historical relics at will. Please keep quiet during the tour, and don't make noise and litter. Please try to avoid going on weekends or holidays, so as to avoid too many people affecting the tour experience. Please know the historical background and cultural connotation of the scenic spot in advance before the tour, so as to better understand and feel the atmosphere of the scenic spot.

5. Surrounding food: After visiting Zhazidong, you can taste local food in a nearby restaurant. It is recommended to taste Chongqing hot pot, small noodles, Maoxuewang and other special foods.

I hope the above information is helpful to you.