Liu Qian's EMC performance features a globally unsolved Bagu拉斯 effect.

At the EMC Global Magic Summit held in Portugal, Liu Qian performed the world-renowned "Berglas Effect," which has remained uncracked by anyone. In the magic community, David Berglas—a legendary British magician now 86 years old—performed a classic and astonishing trick 50 years ago. This trick was mysterious and of such high difficulty that no one has been able to crack it in the past 50 years. It is called the "Berglas Effect" because throughout the performance, the magician does not touch the cards at all, and the incredible effect is completed by random audience members.