The performer holds a matchbox in his left hand and shows the front and back to the audience. The trademark on the top of the box is the word "Yunnan" and the bottom is a landscape pattern. Then, he took an empty handkerchief, covered it with the matchbox, blew on it, and immediately took off the handkerchief. In an instant, the matchbox with the "Yunnan" trademark turned into a matchbox with the "Beijing" trademark. Cover it once and change it again, one time it becomes "Yunnan", the next time it becomes "Beijing".

This magic trick looks very interesting, but it is actually very simple. The trademark pattern on the matchbox is made up of two trademarks, "Yunnan" and "Beijing". The half pattern in the middle can be turned left and right. If you turn it to one side, it is the "Beijing" trademark, and if you turn it to the other side, it is the "Yunnan" trademark. The purpose of covering with a handkerchief is to protect the technique used when folding the trademark; the purpose of blowing is to enhance the atmosphere of the performance.