Under normal circumstances, a merchant like Ye Liuyun would rather not make a profit than reveal his suppliers' contact information to others, since Ye Liuyun relies on the various channels within the Merchant Alliance for every comeback he makes.
This time, the main reason for giving the contact information to Dong Tianyu was the overly dangerous wild business routes, and because the Magic Capital Base is currently under reconstruction, preventing him from leaving to procure goods elsewhere.
If it weren't for their good relationship, Ye Liuyun would rather give up the deal than disclose his supplier's contact information to Dong Tianyu.
After receiving the supplier's contact information from Ye Liuyun, Dong Tianyu did not immediately make the call, but waited for Ye Liuyun to contact the supplier first to make an introduction, which could increase their mutual trust a bit.