what is the distance between pudong airport and hongqiao in Shanghai, China

Which specific place do you refer to in Hongqiao District?
Generally speaking, there is about 50 to 60km between.

Hi
just like to check if i would like to travel from Pudong International airport to Hongqiao to catch the domestic flight to Zhoushan, is below the correct direction to follow:

i copied it in the link that you have given
Line 1
Starting
Pudong International Airport
Hongqiao International Airport
Terminus
Hongqiao International Airport
Pudong International Airport
Service Hours
07:00 - 23:00 (T1); 07:05 - 23:05 (T2)
06:00 - 23:00
Frequency
Every 15~25 minutes
Time Duration
About 1 hour
Fare
CNY30

Yes, you are totally right. The airport shuttle bus line 1 is the best method traveling between two airports.