At present, you can import product reviews to your Shopify store. Tutorial

Here're the main steps:

1. Login Shopify admin to install Product Reviews (App);

2. Export Reviews from the CJ platform (10,000 reviews at most for a product);

3. Modify Reviews CSV file;

4. Import Reviews (CSV file) at Products Reviews in your Shopify store.

Here're the available tutorials for eBay customers, please kindly check.

1. Authorization:  How to Connect eBay with CJ?

2. List Products: How to List Products to eBay?

3. Connect Products: Use CJ Automatic Connection Feature

5. Sync Orders: How to Sync Store Orders?

1. Add the product to Queue;

2. Find the product in My CJ > Products > Listed > Queue;

3. Select the product and click "Bulk Listing" to choose your pricing rules;

For more details, please refer to this tutorial.