1, price increase auction: on Taobao, the number of auction treasures is 1, and the auction price is free to bid from low to high. At the end of the auction, the highest bidder wins the auction.
2. dutch auction: If the auction quantity is greater than 1, the highest bidder will get the treasure first, and the first bidder with the same bid will get it first. The final transaction price of the item is the lowest successful bid.
3. Price reduction auction: an auction method in which the bid of the auction baby decreases from high to low until the bidder pays the price.