The article examines different auction formats used in cities like Singapore, Shanghai, and Guangzhou to allocate car licenses. It looks at how reaction time affects bidding behaviors in these auctions. The study finds that late bids are common in all three cities, but only lead to inefficient allocations in Shanghai. The research suggests that reaction time plays a role in determining the probability of winning in the Shanghai auction. The goal is to improve efficiency and reduce misunderstandings in car license auctions.