The red and black clown's puzzle

Sheriff Scott didn't like summer at all, and the hot weather made everything look listless. He took a long vacation for himself and flew to Shanghai to participate in a solo exhibition of his good friend Luo Jia.

In fact, Scott knows nothing about painting, mainly because he wants to meet old friends. Roga was pleasantly surprised to see Scott coming, so she accompanied him around the showroom.

Roga, a little-known painter, was the first to hold a national tour of his personal works. Spinning, Scott stopped in front of an oil painting called Sunset. The brilliant colors in the painting seem to have a kind of magic that attracts him firmly.

"It took me two years to complete this painting. Either it has been bought by an American collector, or it is nothing to give to an old friend, haha. Roja said.

Scott replied, "Hey, give it to me." But this painting is really beautiful, even I, a layman, can see it. Hey? How can there be an envelope on the ground? ”

The two men stepped over the fence and picked up an envelope underneath the painting that had no address, no stamp, and no seal. Three lines of lead lettering on the back of the envelope:

"In half a year, Sunset will be acquired by me.

I've left a message, that's when I planned to commit the crime!

Red and Black Clowns"

Roga was shocked to see it, but Scott was as calm as ever. The sheriff found 7 playing cards in the envelope: 3, 4 and 1, 2, 5, 6, 7, and 8 of Spades.

Roga was about to call the police when Scott laughed, "What, you forgot I'm a cop too?" Let's first look at the puzzle left by this 'clown', if I can't solve it, it's not too late to call the police. ”

Scott took the playing cards and asked Roja to bring him the schedule of the exhibition. Looking at the calendar and schedule above, Scott finally deduced the timing of the Red and Black Joker's plans.

Q: When did the Red and Black Clown plan to steal the painting?

(For the answer, see the next part, "I'm on the Spot")

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"Morse code", an internationally used code, has become the most classic and commonly used code. With the continuous development of science and technology, many unique codes have emerged, which have become a tool for some special groups of people to safely exchange information. Usually, the sender will scramble the message according to certain rules, and then the receiver will translate the message according to the pre-agreed rules. By doing so, you can ensure that the information is not seen by others.

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