Do I need to charge for shipping on Shopify if CJ is shipping?

[Masrar]

I link products from CJ drop shipping with my shopify store and I believe when customer buy a product from my Shopify store the order will be going to CJ and CJ will ship the order directly to the customer. 
when I test to check out on Shopify it adds shipping cost with the product price. My question is, CJ is shipping so do I need to charge shipping on Shopify too?

[Ladypelles]

I have the same question 

if cj add the shipping and the customer orders then cj ship to customer there shouldn’t be any further shipping cost ?