Try to extract the product detail such as title, desc and price.
After some tests, you might find out it is hard to make the spider get the data through normal Ajax, so you need to dive into the detail of the ajax request.
You need to make sure the URL, HTTP header, cookie values are all reasonable just like what your browser does.
Web scraping using XPath or CSS expression
Load JSON string and extract data
Not only crawl products but also handle pagination
Inspect Ajax requests and mimic them
Learn to inspect the fields of HTTP request
Learn to scrape infinite scrolling pages
Make your spider can work with the cookie
Scrape data behind login form
Learn to scrape data behind a captcha