The route from Yuzhou to changge city is as follows:

1. Depart eastward and go to Mosque Street for 1.2km..

2. Turn right at Junzhou Street for 69 meters.

3. Turn left at Binhe Avenue for 1 meters.

4. Continue along Binhe Avenue for 2 meters.

5. Turn left and continue along Binhe Avenue for 1.8km..

6. Turn left at Huasheng Road for 1.7km..

7. Turn slightly to the left along Provincial Highway 113/Yaocheng Road and continue along Provincial Highway 113 for 4.8km..

8. Turn right, get on the ramp (some sections are charged) and go to Xudeng Expressway for 1.5km..

9. At the intersection, continue to turn right in the direction pointing to Xudeng Expressway, and take Xudeng Expressway (which is charged for this section) for 8.4 kilometers.

11. Take the exit and go to Zheng Shi Expressway (toll for this section) for 1.6km..

11. At the intersection, continue to turn left in the direction pointing to Zheng Shi Expressway, and take Zheng Shi Expressway (toll for this section) for 11.1km..

12. Take the exit and go to Zheng Shi Expressway exit (some sections are charged) for 1.5km..

13. Turn right slightly at Zheng Shi Expressway exit for 6 meters.

14. Turn left at provincial highway 325 for 11.4km..

15. Turn left for 1.5km..

16. Turn right and enter Getian Road for 1.7km..

17. Continue straight into Getian Road for 1.7km..

18. Turn right and continue along Getian Road for 1.4 km.

19. At the roundabout, take the second exit and take the waterway for 1.4km..

21. Turn right at Baqi Road for 1.5km, and you can reach changge city.

I'm sorry, I don't know the specific information about how many stops from Yuzhou to Changge by bus. You can inquire about relevant traffic information or consult the local traffic department for more detailed information.