There's also a method called "open bidding." First, you identify some rough stones at the auction that you're interested in and remember their numbers. After the auction starts, whenever a number is announced, large groups of merchants compete to bid, and the highest bidder wins. It's similar to a live auction...
"Most formal public trading platforms use this form, and our previous small workshop transactions were informal... Among the public platforms, there are more sealed bids and fewer open bids..."
"How do you know so much..." Elder Tang couldn't quite grasp how Sui Yi suddenly became so knowledgeable about the public trading platforms.
Sui Yi just shook his smartphone and coolly spat out two words, "Baidu."
This answer made so much sense that everyone was at a loss for words.
"Alright, more people are arriving; let's disperse," Sui Yi said.
