Can you really calculate the surname according to the length of the measuring hand?

At 09:53 on September 20, 2007, Xinhuanet reported:

The fortune teller can calculate your surname after measuring the width of your hand and the length of your finger with a ruler. Mr. Jia of Yinchuan City reported that some people near the labor market in Nanmen, Yinchuan City have been telling fortune in this way recently, and it is very accurate. I wonder if there is a mystery in this?

Yesterday morning, the reporter came to Nanmen labor market to find out. When I first arrived at the labor market, I saw a bunch of people gathered there to watch. A closer look shows that it is the ruler fortune-telling that Teacher Jia said. A person shouts loudly, saying that a person's real surname and destiny can be worked out for 2 yuan. Another man expressed disbelief and paid 2 yuan money to verify the truth. The fortune teller took out a tape measure, pretended to measure the length of the man's thumb, middle finger and little finger seriously, and then measured the width of the man's palm. Then, the fortune teller began to calculate in the book. At this time, he took out a stack of playing cards with various surnames on them, and asked the man to pick out a playing card with his surname on it and put it on the ground. After he worked it out, let everyone check whether it is accurate. Just after the man put the playing card with his surname on the ground, the fortune teller immediately said the man's surname. When the fortune teller opened the cards, everyone saw that his surname was the same as that on the cards. As a result, the onlookers paid for fortune telling.

Is the fortune teller really that magical? The reporter also spent 2 yuan's money to try it. The fortune teller also asked the reporter to take out a playing card with his surname printed on it. The reporter took a playing card with the surname "Zhang" printed on it, and the other party "accurately" calculated the surname on the playing card, but the reporter was not surnamed Zhang. It can be inferred that this deck of playing cards must be "tricky".