You can only share so much care ... maybe he's ran out and needs to restock ... lol
Why don't you start here and see where it leads? https://cleartax.in/s/gst-law-goods-and-services-tax
Thanks @Direct Webstore - I checked site you pointed and many other, also discussed with different CA's all have different opinion, actually GST was introduced recently (July 2017) in India so still CA's are learning.
Did this now .. will wait if he repliesAnother idea ... why don't you ask him on this thread he started a few days ago ... https://forum.alidropship.com/threads/shoutout-to-indian-dropshippers.8190/#post-45883