While at the auction you are tasked to stop the elevator.
It has an extra security measure: You have to identify some notable pieces of art.
This is the low-spoiler guide for "Sale of the century" puzzle in Chinatown Detective Agency. Unlike in normal walkthrough, you get gradual hints on how to solve the puzzle. Click the big button below to see your first hint. If the hint contains a spoiler, you will be warned about it before clicking.